KR20200139381A - Gas generator for educational of experimenatal - Google Patents

Abstract

The present invention relates to an educational gas generation experiment device. An objective of the present invention is to provide an educational gas generation experiment device enabling students to directly observe a phenomenon of generating gas by a chemical reaction to understand the principle of the chemical reaction, thereby maximizing an educational effect. According to the present invention, the gas generation experiment device comprises: a main body unit having first and second holders disposed on an upper side; first and second reaction units vertically installed in and removed from the first and second holders of the main body unit to be sealed by a packing member; first and second collection devices coupled to the upper side of the first and second reaction units; a solid reactant supplied on the first and second holders to be placed in a reaction space of the first and second reaction units; and a second reactant supplied into the reaction space, in which the solid reactant is placed, through an injection flow path disposed in the first and second holder. Accordingly, identical and different gases are generated in the reaction space by a reaction between the liquid reactant supplied into the reaction space and the solid reactant disposed in the reaction space, and the generated gases are quantitatively collected by the first and second collection devices.

Description

Gas generator for educational of experimenatal}

The present invention relates to an educational gas generation experiment apparatus, and relates to an educational gas generation experiment apparatus capable of generating and collecting the same or different gases by a chemical reaction and facilitating visual observation and collection of the generated gases will be.

In general, gas generation and gas collection experiments by chemical reactions are conducted in elementary school or junior high school students' science experiments to confirm the properties of specific gases (for example, oxygen, carbon dioxide or hydrogen) through chemical reactions of various samples. In addition, such experiments are conducted with a pick-up bottle, a water tank, a funnel, a glass tube, a beaker, and an Erlenmeyer flask.

However, in the conventional experiment as described above, a collecting bottle was simply used as a gas collecting device, so that the amount of generated and stored gas could not be accurately measured, and there was a problem in that it was not possible to visually confirm whether the gas was stored or not. . In particular, since a separate means for controlling the discharge of the gas contained in the pick-up bottle is not provided, the gas must be stored again in the pick-up bottle during repeated experiments, so there was a problem that unnecessary time wasted and troublesome during the experiment.

In particular, the conventional experiment consists of an experiment in which gas is generated by a reaction between a liquid and a liquid, so it is difficult to control the amount of gas generated uniformly, and a difference occurs in the amount of gas generated each time in a number of repeated experiments. As a result, there were various problems, such as being unable to connect with other experimental devices.

Registration Utility Model Bulletin Registration No. 20-0363350 (2004.09.20) Registered Patent Publication Registration No. 10-0692383 (2007.03.02)

It is an object of the present invention to provide an educational gas generation experimental apparatus capable of maximizing educational effects by directly observing the phenomenon in which gas is generated by a chemical reaction, understanding the principle of a chemical reaction, and maximizing an educational effect through it.

Another object of the present invention is to provide an educational gas generation experimental apparatus capable of repeatedly generating and collecting gas by a simple method.

The present invention includes a body portion having first and second holders on the upper side; First and second reaction units vertically detachable to be sealed to the first and second holders of the main body through a packing material; First and second collecting mechanisms coupled to the upper side of the first and second reaction units; A solid reactant supplied on the first and second holders so as to be located in the reaction space in the first and second reaction units; Including; liquid reactants supplied into the reaction space in which the solid reactants are located through the injection passages provided in the first and second holders,

The same or different gases are generated in the reaction space by the reaction of the liquid reactants supplied into the reaction space and the solid reactants arranged in the reaction space, and the generated gases are quantitatively collected by the first and second collection mechanisms. Has been.

In the present invention, the process of gas generation due to the chemical reaction between reactants can be visually observed, so that the understanding of the principle and related learning about the chemical change between reactants can be improved, as well as the participation of trainees through experiments. There is an effect that can be enlarged.

The present invention has a simple structure and is designed to have stability, so that the stability for the experiment process is high, and teachers and students can easily experiment.

In the present invention, it is possible to visually check the exact volume amount of the generated gas, so that it is possible to collect and provide the necessary amount of gas used in the other experimental equipment, that is, the connection with other experimental equipment, and the convenience of use is increased. There is a losing effect.

In the present invention, when the gas reaction unit is connected to the purification unit, a more pure gas can be collected through the aqueous phase substitution method, and thus, there is an effect of improving the collection efficiency for high purity gas.

In the present invention, gas is generated by a reaction between a liquid substance and a solid substance, so that the generation of gas is kept constant even if repeated many times for a long period of time, and the external leakage is prevented.

The present invention can simultaneously generate two different gases and collect them quantitatively, so that not only has the effect of shortening the experiment time for gas collection, but also a flame experiment by gas combustion, a gas reaction experiment, and a rocket launch In conjunction with other experiments such as experiments, it has the effect of understanding gas characteristics more clearly due to gas combustion and chemical reactions.

The present invention is made of a simple structure and small size, it is possible to increase the spatial utility, through this, there is an effect that it is possible to easily conduct a scientific experiment in the laboratory in the school.

In the present invention, since the reaction space portion in which the solid reactant is accommodated is easily sealed by an observation container, there are many effects, such as accurate and rapid experimentation.

1 is an exemplary view showing a configuration according to the present invention
2 is an exemplary view showing an exploded configuration according to the present invention
Figure 3 is another exemplary view showing the configuration of the present invention
4 is an exemplary view showing a detailed structure of a holder according to the present invention
5 is an exemplary view showing the configuration of a reaction tube according to the present invention

1 is an exemplary view showing a configuration according to the present invention, Figure 2 is an exemplary view showing an exploded configuration according to the present invention, Figure 3 is another exemplary view showing the configuration of the present invention, Figure 4 is a diagram of the present invention An exemplary diagram showing a detailed structure of a holder according to the present invention, Figure 5 shows an exemplary diagram showing the configuration of the reaction tube according to the present invention,

In the present invention, the main body 30 having first and second holders 31 and 32 on the upper side and the first and second holders 31 and 32 of the main body are sealed through packing materials 91 and 92 First and second reaction units (10, 20) vertically detachable so as to be installed, first and second collection mechanisms (40, 50) coupled to the upper side of the first and second reaction units (10, 20), and the first ,Solid reactants 60 supplied on the first and second holders 31 and 32 so as to be located in the reaction spaces 12 and 22 in the second reaction section, and the injection passage 34 provided in the first and second holders. Including a liquid reactant 70 supplied into the reaction spaces 12 and 22 in which the solid reactant is located through 35),

Gas is generated in the reaction spaces 12 and 22 by the reaction of the liquid reactant 70 supplied into the reaction spaces 12 and 22 and the solid reactant 60 located in the reaction spaces 12 and 22. The collected gas is quantitatively collected by the first and second collection mechanisms 40 and 50.

In addition, in the present invention, the third holder 33 is further protruded to the main body 30, and the tablet 80 is coupled to the third holder 33 via another packing material 93 do.

1 to 3, the main body 30 includes a main body 30a and first and second holders 31 protruding from the main body at a predetermined height so as to be positioned above the main body 30a. 32), and injection passages 34 and 35 provided through the top surfaces 31b and 32b at the side surfaces 31a and 32a of the first and second holders 31 and 32.

The first and second holders 31 and 32 are to which the first and second reaction units 10 and 20 are respectively coupled, and may have the same size or may be formed to have different sizes.

The injection passages 34 and 35 are for transferring and supplying the liquid reactants 70 into the reaction spaces 12 and 22, and as shown in FIGS. 2 and 4 (a), the liquid reactants 70 The outer injection passages 34a and 35a connected to the stored liquid storage unit 71 and the inner injection passages formed in the first and second holders 31 and 32 to communicate with the outer injection passages 34a and 35a Includes (34b, 35b). That is, the outer injection passages 34a and 35a are installed so as to be located on the side surfaces 31a and 32a of the first and second holders, and the inner injection passages 34b and 35b are top surfaces 31b of the first and second holders. It is formed to be connected to 32b). That is, the inner injection passages 34b and 35b are formed in the first and second holders to communicate with the reaction spaces 12 and 22 of the first and second reaction units.

In the injection passages 34 and 35 configured as described above, the outer injection passages 34a and 35a are connected to the liquid storage unit 71 in which the liquid reactant 70 is stored through the opening/closing valve 72, and the The liquid storage unit 71 may be used as an example screw syringe. In addition, the outer injection passages 34a and 35a may be connected to the liquid storage unit 71 through a separate supply hose 73.

In addition, the main body 30 may further include a third holder 33 on which a purification unit 80 is installed via a packing material 93 as shown in FIGS. 1 to 3, The third holder 33 includes outlets 14 and 24 of the first and second reaction units 10 and 20 and a gas transfer passage 36 connected by a gas supply hose 37.

The gas transfer passage 36 is in communication with the outer gas passage 36a connected to the gas supply hose 37 and the outer gas passage 36a, as shown in FIG. 4B. It includes an inner gas flow path 36b formed in the third holder 33. At this time, the inner gas flow path 36b is formed to be connected to the upper end surface 33b of the third holder. That is, the inner gas flow path 36b is formed to supply gas into the purification unit 80.

The packing material (91, 92, 93) has the first and second reaction parts (10, 20), the first and second holders (31, 32), the purification part (80) and the third holder (33) is airtight/watertight. In order to maintain and combine, the double packing structure, that is, the inner wall 94 and the outer wall 95 are spaced a predetermined distance to achieve double sealing.

In addition, the body part 30 is further provided with a solid reactant storage part 39 on one side.

The solid reactant storage unit 39 is for storing the solid reactant 60 acting as a catalysis, and as shown in FIGS. 1 to 3, a receiving space in which the solid reactant 60 can be stored ( It consists of a box shape having 39a), and is configured to open and close the accommodation space 39a by the cover 39b. The solid reactant storage unit 39 is formed to be spaced apart from the first, second, and third holders by a predetermined distance, and two to three are formed so that the solid reactants used in the first and second reaction units can be separated and stored. Has been.

In addition, the solid reactant storage unit 39 is also preferably made of a transparent material so that the quantity of the solid reactant stored in the receiving space 39a can be easily checked.

The first and second reaction units 10 and 20 are made of transparent glass or a transparent synthetic resin material so that visual observation of the internal reaction spaces 12 and 22 can be made from the outside, and are shown in FIGS. 1 to 5 As described above, it has an outlet (14,24) in which the on-off valves (15,25) are installed, and the lower side is fitted into the first and second holders (31,32) of the main body, and is opened downwardly inside the body. Internal spaces 11 and 21 are formed.

The inner spaces 11 and 21 are the coupling spaces 13 and 23 that are coupled to the first and second holders 31 and 32 and the packing materials 91 and 92, and a reaction in which a reaction of liquid and solid reactants occurs. It consists of spaces 12 and 22.

When the first and second reaction units 10 and 20 are closely coupled to the first and second holders 31 and 32, the reaction spaces 12 and 22 are formed at the top surfaces 31b and 32b of the first and second holders. It refers to an internal space up to the outlets 14 and 24 of the second reaction part, and the coupling spaces 13 and 23 refer to an internal space that is contact-coupled to the first and second holders 31 and 32, The coupling spaces 13 and 23 and the reaction spaces 12 and 22 are only to help explain the present invention, and the inner spaces 11 and 21 are not substantially divided into a reaction space and a coupling space.

In addition, the first and second reaction units 10 and 20 have an inner space at the lower side of the injection passages 34 and 35, that is, passage insertion holes 16 and 26 into which the outer injection passages 34a and 35a are inserted. It is formed through penetration on one side to communicate with (11,21).

In addition, the measurement scales 17 and 27 may be further marked on the outer surfaces of the first and second reaction units 10 and 20, and when the measurement scales 17 and 27 are marked as such, the reaction space 12, 22) There is an effect of being able to quantitatively check the amount of liquid reactant supplied to the inside and the change in the capacity of the liquid reactant due to gas generation.

In addition, the flow path insertion holes 16 and 26 have contact protrusions 16a and 26a further protruding in the inward direction, as shown in (b) of FIG. 5, and the flow path insertion holes 16 and 26 Engaging grooves 34c and 35c that correspond to (engage) the contact protrusions 16a and 26a of the passage insertion hole may be further protruded on both sides of the outer surface of the outer injection passage to be coupled.

That is, when the first and second reaction units 10 and 20 are vertically coupled to the first and second holders 31 and 32, the contact protrusions formed in the passage insertion holes 16 and 26 of the first and second reaction units ( The first and second holders 31 and 32 and the first and second reaction units 10 and 20 are more robust by combining 16a, 26a) and the coupling grooves 34c and 35c formed on both sides of the outer surface of the outer injection channel. Are combined together.

In the meshing coupling by the contact protrusions, shaking or twisting or partial lifting of the first and second reaction units from the first and second holders is prevented by a pressure increase due to gas generation in the reaction space.

The first and second reaction units 10 and 20 configured as described above are integrally fixed to the first and second holders 31 and 32 by fixing bolts 95 as shown in FIGS. 1 to 3. Lose. That is, the bolt holes 18 and 28 are formed through the lower sides of the first and second reaction units 10 and 20 coupled to the first and second holders 31 and 32, and the first and second holders On one side, holder bolt holes 31c and 33c that are in communication with the bolt holes 18 and 28 are formed, and the bolt holes 18 and 28 of the first and second reaction parts and the holder bolt holes of the first and second holders By fastening the fixing bolts 95 to the (31c, 33c), respectively, the first and second holders 31 and 32 and the first and second reaction units 10 and 20 are integrally fixedly installed.

The first and second collection mechanisms 40 and 50 flow into the outlets 14 and 24 of the first and second reaction units to maintain airtightness through the opening and closing valves 15 and 25 as shown in FIG. /The discharge ports (41,51) are connected, and the storage spaces (42,52) in which gas is supplied and collected and stored through the inlet/discharge ports (41,51) are formed therein, and the collection body (43,53), the collection It is inserted and installed to maintain airtightness in the storage spaces 42 and 52 of the main body 43 and 53 and transfers the collected gas stored in the storage spaces 42 and 52 to the outside through the inlet/discharge ports 41 and 51 by pressurization. It may include a pressing portion (44, 54) to let.

In addition, the collecting bodies 43 and 53 of the first and second collecting devices are made of a transparent material such as glass or plastic, and measurement scales 45 and 55 are marked on the outer surface.

In addition, the first and second collecting devices 40 and 50 have inlet/discharge ports 41 and 51 directly connected to the first and second reaction units 10 and 20, or a collecting connection hose (not shown). It may be connected by, and is preferably installed directly connected to the first and second reaction units to be connected in a straight line to the upper side of the first and second reaction units via the opening and closing valves 15 and 25.

The first and second collecting devices 40 and 50 configured as described above may be, for example, an experimental screw syringe and a luer connector for connecting the screw syringe, and are in a straight line with the first and second reaction units. Vertically coupled to position.

The solid reactant 60 generates gas by a chemical reaction with the liquid reactant 70 supplied into the reaction spaces 12 and 22 of the first and second reaction units, and is mounted on the top surfaces of the first and second holders. It is solidified so that this can be done easily.

The liquid reactant 70 generates gas by a chemical reaction with the solid reactant 60 located in the reaction spaces 12 and 22 of the first and second reaction units, and it is easy to control the amount of generated gas. It is composed of liquid so as to be.

The types of the solid reactant 60 and the liquid reactant 70 are not particularly limited, but in the case of collecting hydrogen gas, magnesium, zinc, aluminum, copper, iron, or an alloy thereof as the solid reactant 60 And the like may be used, and acids such as hydrochloric acid, sulfuric acid, nitric acid, etc. may be used as the liquid reactant 70.

In addition, in the case of collecting oxygen gas, manganese dioxide solid may be used as the solid reactant 60, and hydrogen peroxide may be used as the liquid reactant 70. At this time, since the manganese dioxide is usually in the form of a powder, a certain amount cannot be settled in the reaction space, and oxygen gas is explosively generated within a short time when reacting with the liquid reactant, so that the amount of oxygen gas generated can be controlled. Difficult problems are occurring. Therefore, in the present invention, a solid manganese dioxide solid is used instead of a powdery manganese dioxide.

The manganese dioxide solid body has a predetermined volume, and oxygen is constantly generated by reaction with a liquid reactant (hydrogen peroxide), and 40 to 100 parts by weight of gypsum powder is mixed with respect to 100 parts by weight of manganese dioxide to form a mixture. , 20 to 40 parts by weight of water are mixed with the mixture, molded to have a predetermined volume, and dried at room temperature (5 to 35°C) for 10 hours or more, preferably 24 hours or more.

The gypsum powder not only has a binder function for manganese dioxide, but also generates ethringite, a microporous substance by hydration reaction, so that the manganese dioxide (powder) mixed while maintaining a constant strength of the solid manganese dioxide It has a function to be catalyzed.

When the gypsum powder is added in an amount of less than 40 parts by weight, solidification is difficult due to the decrease in strength, and cracking occurs during the reaction test, and when it is added in more than 100 parts by weight, the content of manganese dioxide decreases and the amount of oxygen gas is generated. Since this decreases, it is preferable to add within an appropriate range.

The manganese dioxide solid formed as described above is not only easy to use, but also has a limited amount of manganese dioxide in contact with the liquid reactant, so that the amount of oxygen generated for a long time can be stably secured, and it can be repeatedly reused many times.

In addition, in the case of collecting carbon dioxide, hydrochloric acid may be used as the liquid reactant 70, and marble (limestone) may be used as the solid reactant 60.

The purification unit 80 is for purifying and collecting a gas that is lighter than air among gases generated in the first and second reaction units 10 and 20, as shown in Figs. 1 to 5, transparent glass or It is made of a transparent synthetic resin material, and a gas outlet 84 to which the third collecting mechanism 88 is connected is formed on the upper side, and the lower side is the third holder 33 of the main body through the packing material 93 as a medium. It is fitted so as to maintain airtightness, and an internal space 81 opened downward is formed therein.

The inner space 81 consists of a coupling space 83 that is coupled to the third holder 33 and the packing material 93, and a collection space 82 in which water is stored and gas is collected for purification of gas. have. The coupling space 83 and the collection space 82 are intended to help understanding when the purification unit 80 is vertically coupled to the third holder 33, and substantially the inner space 81 of the purification unit is a combination space 83 ) And the collection space 82 are not formed separately.

In addition, the purification unit 80 is formed through the lower side of the gas transfer passage 36, that is, a passage insertion hole 86 into which the outer gas passage 36a is inserted, to communicate with the inner space 81. have.

The third collecting mechanism 88 is for collecting/moving the pure gas collected in the purification unit, and a screw syringe or the like may be used, and the screw syringe is a gas outlet 84 through an opening/closing valve 87 as a medium. ) Is connected and installed.

The purification unit 80 configured as described above is installed to be sealed in the third holder 33 of the main body, and then water is injected and filled into the collection space 82 of the purification unit through the gas injection passage 85 or the gas outlet 84. And, the gas generated in the first reaction unit 10 or the second reaction unit 20 is supplied into the collection space 82 by the gas supply hose 37, so that the purified gas is collected in the collection space. Will be done.

In addition, the on-off valve installed in the present invention is preferably made of a three-way valve or a two-way valve that maintains airtightness and watertightness, and since such an on-off valve is a known one, a detailed description thereof will be omitted.

The educational gas generation experiment apparatus of the present invention configured as described above can be efficiently applied to the capture and purification of hydrogen, oxygen, and carbon dioxide, which is lighter than air, but is not necessarily limited thereto, and is used for the generation and collection of various gases. I can.

Capture of hydrogen and oxygen gas

Put a piece of magnesium on the top surface of the first holder of the main body and a solid manganese dioxide on the top surface of the second holder, and seal the reaction space by combining the first and second reaction units to the first and second holders of the main body, respectively, When dilute hydrochloric acid is injected and supplied through the injection channel into the reaction space of the first reaction unit and hydrogen peroxide is injected and supplied through the injection channel into the reaction space of the second reaction unit, the reaction between diluted hydrochloric acid and magnesium in the reaction space of the first reaction unit is prevented. As a result, hydrogen gas is generated, and oxygen gas is generated by the reaction between the solid manganese dioxide and hydrogen peroxide in the reaction space of the second reaction section.

As described above, the hydrogen gas generated and stored in the first reaction unit and the oxygen gas generated and stored in the second reaction unit are collected by the first collecting device coupled to the first reaction unit and the second collecting unit coupled to the second reaction unit. It can be used for experiments requiring hydrogen or oxygen gas. At this time, since the hydrogen or oxygen gas is lighter than air, the first and second collection ports allow the transfer of hydrogen or oxygen gas without closing the inlet/discharge ports.

Since the dilute hydrochloric acid and hydrogen peroxide are those known to be used to generate hydrogen and oxygen gas, detailed descriptions thereof will be omitted.

The present invention is not limited to the specific preferred embodiments described above, and any person of ordinary skill in the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims can implement various modifications. Of course, such changes will fall within the scope of the description of the claims.

(10): first reaction unit (11): internal space
(12): reaction space (13): coupling space
(14): outlet (15): on-off valve
(16): channel insertion hole (16a): contact protrusion
(17): Measurement scale (18): Bolt hole
(20): second reaction unit (21): internal space
(22): reaction space (23): coupling space
(24): outlet (25): on-off valve
(26): channel insertion hole (26a): contact protrusion
(27): Measurement scale (28): Bolt hole
(30): body part (30a): body
(31): first holder (31a): side
(31b): Top surface (31c): Holder bolt hole
(32): second holder (32a): side
(32b): Top side (32c): Holder bolt hole
(33): 3rd holder (33a): side
(33b): top surface (34): injection passage (1 holder)
(34a): outer injection passage (34b): inner injection passage
(34c): coupling groove (35): injection passage (2 holders)
(35a): Outer injection passage (35b): Inner injection passage
(35c): coupling groove (36): gas transfer passage
(36a): outer gas passage (36b): inner gas passage
(37): Gas supply hose
(39): solid reactant storage unit (40): first collecting device
(41): inlet/outlet (42): storage space
(43): collecting body (44): pressing part
(45): Measurement scale
(50): second collection mechanism (51): inlet/outlet
(52): storage space (53): collection body
(54): pressure part (55): measurement scale
(60): solid reactant
(70): liquid reactant (71): liquid storage unit
(72): On-off valve (73): Supply hose
(80): Purification unit (81): Internal space
(82): collection space (83): combined space
(84): gas outlet (85): gas injection passage
(86): channel insertion hole (87): opening and closing valve and connecting pipe
(88): 3rd collecting mechanism (91,92,93): packing material
(94): inner wall (95): outer wall
(100): Educational gas generation experiment device

Claims (8)

A body portion having first and second holders on the upper side;
First and second reaction units vertically detachably mounted to be sealed to the first and second holders of the main body through a packing material;
First and second collecting mechanisms coupled to the upper side of the first and second reaction units;
A solid reactant supplied on the first and second holders so as to be located in the reaction space in the first and second reaction units;
Including; a liquid reactant supplied into the reaction space in which the solid reactant is located through the injection passage provided in the first and second holders,
The same or different gases are generated in the reaction space by the reaction of the liquid reactants supplied into the reaction space and the solid reactants arranged in the reaction space, and the generated gases are quantitatively collected by the first and second collection mechanisms. Educational gas generation experiment device characterized by.
The method according to claim 1;
It includes a main body, a main body, first and second holders protruding from the main body to a predetermined height so as to be positioned above the main body, and an injection passage provided through the upper surface of the side surfaces of the first and second holders,
The injection flow path includes an outer injection channel connected to the liquid storage unit in which the liquid reactant is stored, and an inner injection channel formed in the first and second holders so as to communicate with the outer injection channel. Device.
The method according to claim 1;
The first and second reaction units are made of transparent glass or a transparent synthetic resin material, and have an outlet at which an opening/closing valve is installed on the upper side, and the lower side is fitted into the first and second holders of the main body, and the inner space that is opened downward is A gas generation experiment apparatus for education, characterized in that the flow path insertion hole into which the injection flow path is inserted is formed through, so as to communicate with the internal space.
The method according to claim 3;
In the passage insertion hole, a contact protrusion is formed further protruding in the inward direction, and another contact protrusion corresponding (engaged) to the contact protrusion of the passage insertion hole is on both sides of the outer surface of the injection passage outside of the injection passage to which the passage insertion hole is coupled. Educational gas generation experiment device, characterized in that the protrusion is formed.
The method according to claim 1;
The solid reactant is one selected from the group consisting of magnesium or magnesium alloy, zinc or zinc alloy, aluminum or aluminum alloy, copper or copper alloy, iron or iron alloy, manganese dioxide solid, marble (limestone),
The liquid phase reactant is an educational gas generation experiment apparatus, characterized in that one selected from hydrochloric acid, sulfuric acid, nitric acid, and hydrogen peroxide so that gas is generated by reaction with the solid reactant.
The method according to claim 5;
The manganese dioxide solid body is formed by mixing 40 to 100 parts by weight of gypsum powder with respect to 100 parts by weight of manganese dioxide (powder) to form a mixture, and 20 to 40 parts by weight of water is mixed with the mixture to form a predetermined volume. Educational gas generation experimental apparatus, characterized in that it has been dried for 10 hours or more at (5∼35℃).
The method according to claim 1 or 2;
The body portion has a third holder protruding further from the upper side of the body, and the tablet portion is coupled to the third holder through another packing material,
The third holder includes a gas transfer passage connected by an outlet of the first and second reaction units and a gas supply hose,
The gas transfer passage includes an outer gas passage connected to a gas supply hose and an inner gas passage formed in a third holder to communicate with the outer gas passage,
The purification unit is made of transparent glass or a transparent synthetic resin material, and is provided with a gas outlet to which a third collection mechanism is connected and installed on the upper side, and the lower side is fitted to the third holder of the main body to maintain airtightness through a packing material. An educational gas generation experiment apparatus, characterized in that the combined, downwardly opened internal space is formed therein.
The method according to claim 1;
The main body is further provided with a solid reactant storage unit on one side,
The solid reactant storage unit is formed in a box shape having an accommodation space in which the solid reactant can be stored, and the accommodation space is opened and closed by a cover.

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