CN2591696Y

CN2591696Y - Non-toxic combustion condition demonstration experimental apparatus

Info

Publication number: CN2591696Y
Application number: CN 02251198
Authority: CN
Inventors: 金丽雯; 王成文
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-13
Filing date: 2002-12-13
Publication date: 2003-12-10
Anticipated expiration: 2012-12-13

Abstract

The utility model relates to a non-toxic combustion condition demonstration experimental apparatus used for a chemistry teaching experiment in a middle school. A glass pipe is technically transversely fixed by an iron frame table provided with an iron clamp; both ends of the glass pipe are plugged with rubber plugs; a thin glass pipe is inserted in the rubber plug at one end and is connected with an inflator; a right angle-shaped thin glass pipe is inserted in the rubber plug at the other end, a vertical part is inserted in a rubber plug of a round bottom flask, and therefore, the glass pipe is connected with the round bottom flask; a thin glass pipe is inserted in the rubber plug of the round bottom flask, the other end of the thin glass pipe is positioned in a conical flask, and the glass pipe is connected with the conical flask; an alcohol lamp is put on a base of the iron frame table provided with the clamp, and all the experimental articles are positioned on a thin copper piece to be positioned in the glass pipe, which forms the apparatus of the utility model. The utility model solves the problems that a conditioning experiment of chemistry combustion in a middle school is toxic, and environment is polluted. The utility model has the advantages of safety, simplicity and long service life. Teaching and learning effects can be improved. The utility model can be widely popularized and applied in chemistry teaching in a middle school.

Description

The condition demonstrating experiment device of nontoxic burning

Technical field:

The utility model relates to a kind of condition demonstrating experiment device of nontoxic burning of high school chemistry teaching experiment usefulness.

Background technology:

Present domestic high school chemistry teaching is continued to use always and is utilized dress hot water in the beaker to put a copper sheet on rim of a cup to put the condition lecture experiment that a small amount of white phosphorus and red phosphorus are done burning in the above, operate by the requirement on the chemical textbook, though it is simple and easy to do, but when chemical reaction, can produce the white cigarette of more phosphorus pentoxide, pollute the classroom but also poisonous, it is healthy to influence teachers and students.

The utility model content:

In order to overcome the deficiency that adopts the burning condition experiment in the existing chemistry teaching, the utility model provides a kind of condition demonstrating experiment device of nontoxic burning, this device can not only well be finished the condition experiment of burning by the teaching requirement, and can not give off poisonous gas in the experiment, the health that helps teachers and students is not polluted the classroom.

The technical scheme that its technical matters that solves the utility model adopts is: the condition according to burning is temperature and oxygen, the inventor designs the condition demonstrating experiment device of the nontoxic burning of a cover in conjunction with chemistry teaching practice for many years, this device is the glass tube of test usefulness to be fixed with the iron stand of being with iron clamp and its two ends are stopped up with rubber stopper, inserting a thin glass tube in the rubber stopper at one end links to each other with inflator, insert a square thin glass tube in the rubber stopper of end in addition, and vertical component is inserted realize in the rubber stopper of round-bottomed flask being connected of horizontal glass tube and round-bottomed flask, also inserting a vertical thin glass tube in its rubber stopper is connected with conical flask, put a spirit lamp between the iron stand base of being with iron clamp and horizontal glass tube, the scale copper that also has test usefulness constitutes the condition demonstrating experiment device of nontoxic burning; The test scale copper of getting the long 12cm of a wide 1.5cm when using this device is placed on a spot of two rickle white phosphorus and the rickle red phosphorus 5cm of being separated by on the scale copper, middle white phosphorus is good with a little glass calotte, again scale copper is put into diameter 2cm, in the horizontal glass tube of long 22cm.One end and the inflator round-bottomed flask of adorning a small amount of cotton in the end and long-neck in addition that links to each other is connected with the conical flask that 10%NaoH solution is housed.Heat facing to the glass tube of putting the red phosphorus position with spirit lamp during experiment, and constantly in glass tube, blast air at leisure with inflator, for a moment, visible from the burning earlier of flame white phosphorus farthest, for a moment, in the flask of drying, be full of dense white cigarette, the white drift conical flask of part is absorbed by sodium hydroxide solution, has burnt at white phosphorus, and the back for a moment, red phosphorus just takes fire, and the white phosphorus that covers on below the glass cap does not burn.Test findings draws the condition of burning: the one, and make the temperature of combustible reach kindling point; The 2nd, combustible is contacted with oxygen.The result not only draws the burning conditions needed well by experiment, and can in flask, collect certain phosphorus pentoxide again, can allow observation of students arrive color, the state of phosphorus pentoxide, can also prevent effectively that the phosphorus burning from producing a large amount of white smoke pollution environment of phosphorus pentoxide, reduces the murder by poisoning to teachers and students of poisonous substance and gas.

The beneficial effects of the utility model are, this device is installed simple, and experiment effect is good, all the other parts are longer serviceable life except that scale copper is in time maintained or changes, make the student feel intuitively, easily remember, sharpen understanding, to teachers and students' nonhazardous of participating in the experiment, free from environmental pollution.

Description of drawings:

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model one-piece construction synoptic diagram.

Among the figure 1, the iron stand of band iron clamp, 2, glass tube, 3, red phosphorus, 4, white phosphorus, 5, round-bottomed flask, 6, cotton, 7, grass tube, 8, conical flask, 9,10%NaoH solution, 10, rubber stopper, 11, scale copper, 12, glass cap, 13, spirit lamp.

Embodiment:

In Fig. 1, iron stand 1 crosswise fixed with glass tube 2 usefulness band iron clamp, and with rubber stopper 10 obstructions of its two ends, insert thin glass tubes in the rubber stopper 10 at one end and link to each other with inflator, in addition insert square thin glass tubes in the rubber stopper 10 of end and vertical component is inserted realize in the rubber stopper 10 of round-bottomed flask 5 being connected of horizontal glass tube 2 and round-bottomed flask 5, rubber stopper 10 in round-bottomed flask 5 inserts a vertical thin glass tube, its in addition end put into conical flask 8 and realize and being connected of conical flask 8; On the base of the iron stand 1 of being with iron clamp, put a spirit lamp 13, during experiment a spot of two rickle white phosphorus 4 and a rickle red phosphorus 3 are placed on the scale copper 11 of 12 * 1.5cm, on middle little glass calotte of rickle white phosphorus 4 usefulness, and then the scale copper 11 and the test article of placing above thereof put into the glass tube 2 that diameter is the long 22cm of 2cm together, put into cotton 6 in the long-neck with round-bottomed flask before the test, and quantitative 10%NaoH solution 9 is poured in the conical flask 8.

Claims

1, a kind of condition demonstrating experiment device of nontoxic burning, it is characterized in that: with iron stand (1) crosswise fixed of glass tube (2) with the band iron clamp, and with rubber stopper (10) obstruction of its two ends, insert a thin glass tube in the rubber stopper at one end (10) and link to each other with inflator, insert a little thin glass tube of square in the rubber stopper (10) of other end and vertical component is inserted the middle horizontal glass tube of realization of rubber stopper (10) (2) of round-bottomed flask (5) and being connected of round-bottomed flask (5), insert a vertical thin glass tube in the rubber stopper (10) in round-bottomed flask (5), its in addition end put into being connected of conical flask (8) realization and conical flask (8), on the base of the iron stand (1) of being with iron clamp, put a spirit lamp (13), during experiment a spot of two rickle white phosphorus (4) and a rickle red phosphorus (3) are placed on the scale copper (11), middle rickle white phosphorus (4) is with on a little glass cap (12) cover, and then scale copper (11) and top placement test article thereof put into glass tube (2) together, put into cotton (6) in the long-neck with round-bottomed flask before the test, and quantitative 10%NaoH solution (9) is poured in the conical flask (8).