CN210271436U

CN210271436U - Experimental device for demonstrating combustion of charcoal in oxygen

Info

Publication number: CN210271436U
Application number: CN201921154192.6U
Authority: CN
Inventors: 林师龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-04-07
Anticipated expiration: 2029-07-23

Abstract

The utility model provides an experimental apparatus for demonstration charcoal burns in oxygen, its main characterized in that: the device consists of a wide-mouth bottle (2) with a hole drilled on the wall of the middle upper part filled with manganese dioxide (1), a first single-hole rubber plug (3), an injector (4) filled with hydrogen peroxide solution, a burning spoon (5) filled with red hot charcoal (6), a horizontal-mouth pipe (7) filled with clear lime water and a second single-hole rubber plug (8). The experimental device for the reaction of charcoal and oxygen in the teaching material has the following defects: a bottle of oxygen needs to be prepared first, which is troublesome; the products of charcoal combustion were not examined. The utility model can overcome the defects of the device in the teaching material and can detect the combustion products of the charcoal; the utility model discloses the commonality is strong, both is suitable for the teacher to do the demonstration experiment, is suitable for the student again and does the experiment of grouping.

Description

Experimental device for demonstrating combustion of charcoal in oxygen

One, the technical field

The utility model belongs to a chemistry field relates to a chemistry experimental apparatus, and is specifically used for demonstrating the experiment that charcoal burns in oxygen on junior high school chemistry textbooks.

Second, background Art

The experiment of charcoal burning in oxygen in the nine-year compulsory education chemistry textbook, page 31 [ activities and explorations ], published by shanghai education press 2014, 7 months, is demonstrated as follows: clamping charcoal with a crucible, igniting the charcoal in air, putting the ignited charcoal into a burning spoon, and slowly extending into a gas collecting bottle full of oxygen from top to bottom. The experiment in the teaching material has the defects that: the oxygen of a gas collecting bottle needs to be prepared in advance, which is troublesome and wastes much time; charcoal combustion products were not tested.

Third, the contents of the utility model

The utility model aims to provide an experimental apparatus for demonstration charcoal burns in oxygen. Use the utility model discloses do the experiment, can overcome teaching material in experimental apparatus's defect, easy and simple to handle can inspect out the result that the charcoal burns moreover, the phenomenon is obvious.

The purpose of the utility model is realized by the following method:

the utility model provides an experimental apparatus of demonstration charcoal burning in oxygen which main characterized in that: the device consists of a wide-mouth bottle (2) with a hole drilled on the wall of the middle upper part filled with manganese dioxide (1), a first single-hole rubber plug (3), an injector (4) filled with hydrogen peroxide solution, a burning spoon (5) filled with red hot charcoal (6), a horizontal-mouth pipe (7) filled with clear lime water and a second single-hole rubber plug (8).

A first single-hole rubber stopper (3) with a syringe (4) tightly plugs the hole on the middle upper wall of the wide-mouth bottle (2) filled with manganese dioxide (1). The opening of the wide-mouth bottle (2) with a hole drilled on the wall of the middle upper part filled with manganese dioxide (1) is tightly plugged by a second single-hole rubber plug (8) with a transverse pipe (7). A burning spoon (5) filled with red hot charcoal (6) extends into a horizontal port pipe (7) filled with clear lime water.

The experimental process comprises the following steps: a hole is drilled in the wall of the middle upper part of the jar (2) by a glass drill, and then the instrument is connected to check the airtightness of the device. An appropriate amount of manganese dioxide (1) is loaded into a jar (2) drilled with a hole in the wall of the middle upper portion. The needle of the syringe (4) containing the hydrogen peroxide solution is pierced through the first single-hole rubber stopper (3), and the hole on the upper middle wall of the wide-mouth bottle (2) containing the manganese dioxide (1) is tightly plugged by the first single-hole rubber stopper (3) with the syringe (4). A proper amount of clear lime water is filled in the horizontal opening pipe (7), the horizontal opening pipe (7) is inserted on the second single-hole rubber plug (8), and the opening of the wide-mouth bottle (2) with a hole drilled on the wall of the middle upper part filled with the manganese dioxide (1) is plugged by the second single-hole rubber plug (8) with the horizontal opening pipe (7). In the experiment, the syringe (4) was slightly pushed to inject a proper amount of hydrogen peroxide solution into the jar (2) containing manganese dioxide (1), and it was observed that a large amount of bubbles were generated in the jar (2). A small piece of charcoal (6) is put into a burning spoon (5), heated to red in the air, the burning phenomenon of the charcoal in the air is observed, then the burning spoon (5) filled with the red hot charcoal (6) is inserted into a horizontal pipe (7) filled with clear lime water, and the charcoal can be seen to burn more vigorously and emit white light, and is continuously reduced. When no bubble is generated in the wide-mouth bottle (2), the mouth of the transverse-mouth pipe (7) is covered by a glass sheet, so that carbon dioxide generated by burning charcoal in oxygen is fully contacted with the clear lime water, and the clear lime water in the transverse-mouth pipe (7) turns turbid after a while. The reasons why the above phenomena occur are: under the catalytic action of manganese dioxide, oxygen generated by decomposing hydrogen peroxide enters the transverse opening pipe (7) through a hole at the lower end of the transverse opening pipe (7), and red hot charcoal (6) burns more vigorously in the transverse opening pipe (7) filled with the oxygen to emit white light; the carbon dioxide reacts with the clarified lime water to form water-insoluble calcium carbonate. The above experimental phenomena demonstrate that charcoal burns more vigorously in oxygen than in air and produces gases that can turn clear lime water cloudy.

The utility model has the advantages that: oxygen does not need to be collected first, so that time and labor are saved; the amount of the hydrogen peroxide solution can be controlled by the injector to achieve the effect of continuously generating oxygen, so that the charcoal burns more vigorously and durably; the utility model discloses the commonality is strong, both is suitable for the teacher to do the demonstration experiment, is suitable for the student again and does the experiment of grouping.

Description of the drawings

Fig. 1 is a structural view of the present invention.

The symbols in the figures represent:

(1) a wide-mouth bottle (3) with a hole drilled on the wall of the middle upper part of manganese dioxide (2), a first single-hole rubber plug (4) of an injector (5) filled with hydrogen peroxide solution, a combustion spoon (6), red hot charcoal (7), a transverse port tube (8) filled with clear lime water, and a second single-hole rubber plug

Fifth, detailed description of the invention

The present invention will be further described with reference to the following detailed description:

The utility model discloses a use method: a hole is drilled in the wall of the middle upper part of the jar (2) by a glass drill, and then the instrument is connected to check the airtightness of the device. An appropriate amount of manganese dioxide (1) is loaded into a jar (2) drilled with a hole in the wall of the middle upper portion. The needle of the syringe (4) containing the hydrogen peroxide solution is pierced through the first single-hole rubber stopper (3), and the hole on the upper middle wall of the wide-mouth bottle (2) containing the manganese dioxide (1) is tightly plugged by the first single-hole rubber stopper (3) with the syringe (4). A proper amount of clear lime water is filled in the horizontal opening pipe (7), the horizontal opening pipe (7) is inserted on the second single-hole rubber plug (8), and the opening of the wide-mouth bottle (2) with a hole drilled on the wall of the middle upper part filled with the manganese dioxide (1) is plugged by the second single-hole rubber plug (8) with the horizontal opening pipe (7). In the experiment, the syringe (4) was slightly pushed to inject a proper amount of hydrogen peroxide solution into the jar (2) containing manganese dioxide (1), and it was observed that a large amount of bubbles were generated in the jar (2). A small piece of charcoal (6) is put into a burning spoon (5), heated to red in the air, the burning phenomenon of the charcoal in the air is observed, then the burning spoon (5) filled with the red hot charcoal (6) is inserted into a horizontal pipe (7) filled with clear lime water, and the charcoal can be seen to burn more vigorously and emit white light, and is continuously reduced. When no bubble is generated in the wide-mouth bottle (2), the mouth of the transverse-mouth pipe (7) is covered by a glass sheet, so that carbon dioxide generated by burning charcoal in oxygen is fully contacted with the clear lime water, and the clear lime water in the transverse-mouth pipe (7) turns turbid after a while. The reasons why the above phenomena occur are: under the catalytic action of manganese dioxide, oxygen generated by decomposing hydrogen peroxide enters the transverse opening pipe (7) through a hole at the lower end of the transverse opening pipe (7), and red hot charcoal (6) burns more vigorously in the transverse opening pipe (7) filled with the oxygen to emit white light; the carbon dioxide reacts with the clarified lime water to form water-insoluble calcium carbonate. The above experimental phenomena demonstrate that charcoal burns more vigorously in oxygen than in air and produces a gas that turns clear limewater muddy. The utility model has the advantages that: oxygen does not need to be collected first, so that time and labor are saved; the amount of the hydrogen peroxide solution can be controlled by the injector to achieve the effect of continuously generating oxygen, so that the charcoal burns more vigorously and durably; the utility model discloses the commonality is strong, both is suitable for the teacher to do the demonstration experiment, is suitable for the student again and does the experiment of grouping.

Claims

1. The utility model provides an experimental apparatus of demonstration charcoal burning in oxygen which main characterized in that: the device consists of a wide-mouth bottle (2) with a hole drilled on the wall of the middle upper part filled with manganese dioxide (1), a first single-hole rubber plug (3), an injector (4) filled with hydrogen peroxide solution, a combustion spoon (5) filled with red hot charcoal (6), a horizontal-mouth tube (7) filled with clarified lime water and a second single-hole rubber plug (8), wherein the first single-hole rubber plug (3) with the injector (4) tightly plugs the hole on the wall of the middle upper part of the wide-mouth bottle (2) filled with the manganese dioxide (1), the second single-hole rubber plug (8) with the horizontal-mouth tube (7) tightly plugs the mouth of the wide-mouth bottle (2) filled with the manganese dioxide (1), and the combustion spoon (5) filled with the red hot charcoal (6) extends into the horizontal-mouth tube (7) filled with the clarified lime water.