Glass tube for chemical experiment

Abstract

The utility model discloses a glass tube for chemical experiments, which comprises a glass tube main body, reaction cavities are symmetrically and integrally formed on the glass tube main body, different reactants can be respectively placed in the two reaction cavities, and sodium carbonate and sodium bicarbonate are respectively added into the two reaction cavities in the experimental operation of distinguishing the sodium carbonate and the sodium bicarbonate. The reaction cavity is of an arc-shaped cavity structure, the reactant can be conveniently placed from any position and angle due to the arrangement of the arc-shaped cavity structure, and the reactant can fall into the bottom of the arc-shaped cavity along the inner side arc surface; a sealing heat insulation sheet is fixedly connected to the inner side wall of the glass tube main body and is positioned between the two reaction cavities, and the sealing heat insulation sheet has a sealing heat insulation effect on the two reaction cavities, so that the two reaction cavities are independent from each other and are prevented from influencing each other; the glass tube for the chemical experiment simplifies arrangement and operation of experimental instruments for distinguishing sodium carbonate and sodium bicarbonate and subsequent instrument cleaning, and provides convenience for the experiment.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical experiment tools, and specifically relates to a glass tube for chemical experiments. Background Art

[0002] In chemical experiment teaching, sodium carbonate and sodium bicarbonate have many commonalities. For example, they can react with hydrochloric acid (or sulfuric acid, nitric acid) to generate gas that can make clear lime water turbid, lime water or barium hydroxide solution can generate white precipitate, and the flame color reaction is yellow. The above commonalities make it difficult for students to distinguish between sodium carbonate and sodium bicarbonate, and the difference between the two has also become the focus of teaching. The difference between sodium carbonate and sodium bicarbonate is:

[0003] 1. Thermal stability: Sodium carbonate does not decompose when heated, while sodium bicarbonate easily decomposes into sodium carbonate, water and carbon dioxide when heated;

[0004] 2. Water solubility: The solubility of sodium carbonate in water is greater than that of sodium bicarbonate in water;

[0005] 3. Reaction with carbon dioxide: Sodium carbonate can react with carbon dioxide and water to form sodium bicarbonate, while sodium bicarbonate does not react;

[0006] 4. Reaction with sodium hydroxide: Sodium bicarbonate can react with sodium hydroxide to produce sodium carbonate and water, while sodium carbonate does not react;

[0007] 5. Reaction with calcium chloride (or barium chloride): Sodium carbonate and calcium chloride (or barium chloride) solution are easy to form carbonate precipitation, while sodium bicarbonate is not easy to form precipitation;

[0008] 6. Reaction with phenol: Sodium carbonate can react with phenol to form sodium phenolate and sodium bicarbonate, while sodium bicarbonate does not react;

[0009] According to the above differences, the method for distinguishing sodium carbonate from sodium bicarbonate is: according to the different thermal stabilities, a small amount of samples can be heated respectively, and the generated gas is passed into clarified lime water, wherein the sample that can make the clarified lime water turbid is sodium bicarbonate, but this method uses more instruments and devices, and it is necessary to heat two containers at the same time and then pass the gases of the two containers into clarified lime water respectively, and there are cumbersome operations in the instrument layout, operation and subsequent instrument cleaning. Therefore, a glass tube for chemical experiments is proposed. Utility Model Content

[0010] The utility model aims to provide a glass tube for chemical experiments to solve the problems raised in the above background technology.

[0011] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a glass tube for chemical experiments, comprising a glass tube body, wherein the glass tube body is symmetrically and integrally formed with reaction chambers, wherein two reaction chambers can be used to place different reactants respectively, for example, in an experimental operation of distinguishing sodium carbonate from sodium bicarbonate, sodium carbonate and sodium bicarbonate are added to the two reaction chambers respectively, wherein the reaction chamber is an arc-shaped chamber structure, and the design of the arc-shaped chamber structure is convenient for placing reactants from any position and angle, and the reactants can fall into the bottom of the arc-shaped chamber along the inner arc surface, and the two ends of the glass tube body are open structures, and the reactants can be sent into the corresponding reaction chambers along the openings of the glass tube body, and the gases generated by the reactants during the heating process can also be transmitted out through the openings of the glass tube body. The inner wall of the glass tube body is fixedly connected with a sealing heat-insulating sheet between the two reaction chambers, and the sealing heat-insulating sheet seals and insulates the two reaction chambers, so that the two reaction chambers are independent of each other to prevent mutual influence. The sodium carbonate and sodium bicarbonate in the two reaction chambers are heated, and the generated gas can be introduced into clarified lime water according to different thermal stability, wherein the sample that can make the clarified lime water turbid is sodium bicarbonate. A carbon dioxide sensor can also be arranged at the opening of the glass tube body to monitor the generation of carbon dioxide, and the sample with carbon dioxide generated is sodium bicarbonate. The glass tube for chemical experiments simplifies the experimental instrument layout, operation and subsequent instrument cleaning for distinguishing sodium carbonate and sodium bicarbonate, providing convenience for the experiment.

[0012] Preferably, the sealing and heat-insulating plate includes a main partition and a side wing partition, and the number of the side wing partitions is 2. The two side wing partitions are respectively located on both sides of the main partition. The main partition and the side wing partitions are arranged between the two reaction chambers to form a three-layer sealing structure, which seals and insulates the two reaction chambers, so that the two reaction chambers are independent of each other to prevent mutual influence.

[0013] Preferably, the main spacer and the side wing spacer are fixedly connected via a connecting plate, and the main spacer and the side wing spacer are connected together via the connecting plate to form an integrated structure, which is convenient for unified fixed installation in the glass tube body.

[0014] Preferably, integrated rings are provided on the circumferential sides of the main spacer and the side wing spacer, and the circumferential side walls of the main spacer and the side wing spacer are fixedly connected to the integrated rings, and the integrated rings are fixedly connected to the inner side walls of the glass tube body. The provision of the integrated rings further enhances the overall unity of the sealing thermal insulation sheet, and facilitates the unified and fixed installation of the sealing thermal insulation sheet in the glass tube body.

[0015] Preferably, a connecting groove is symmetrically integrally formed on the inner side wall of the integrated ring, and the peripheral side wall of the wing spacer is inserted into the corresponding connecting groove and fixedly connected to the connecting groove. The setting of the connecting groove increases the connection firmness between the wing spacer and the integrated ring.

[0016] Preferably, the space enclosed by the main spacer, the side wing spacer and the integrated ring is a heat-insulating space, and the heat-insulating space is filled with a heat-insulating filler, and the heat-insulating filler further improves the heat-insulating property of the sealing heat-insulating sheet.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) A glass tube body is provided, and a reaction chamber is symmetrically formed on the glass tube body. Different reactants can be placed in the two reaction chambers respectively. In the experimental operation of distinguishing sodium carbonate and sodium bicarbonate, sodium carbonate and sodium bicarbonate are added to the two reaction chambers respectively. The reaction chamber is an arc-shaped cavity structure. The setting of the arc-shaped cavity structure is convenient for placing the reactants from any position and angle, and the reactants can fall into the bottom of the arc-shaped cavity along the inner arc surface;

[0019] (2) Both ends of the glass tube body are open structures, and the reactants can be sent into the corresponding reaction chambers through the openings of the glass tube body. The gases generated by the reactants during the heating process will also be transmitted out through the openings of the glass tube body. The inner wall of the glass tube body is fixedly connected with a sealing heat insulation sheet located between the two reaction chambers. The sealing heat insulation sheet plays a sealing and heat-insulating role for the two reaction chambers, making the two reaction chambers independent and preventing mutual influence;

[0020] The glass tube used in this chemical experiment simplifies the arrangement, operation and subsequent cleaning of the experimental instruments for distinguishing sodium carbonate and sodium bicarbonate, providing convenience for the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0022] Figure 2 This is a cross-sectional view of the main body of the glass tube of the utility model;

[0023] Figure 3 For this utility model Figure 2 The enlarged schematic diagram at A in the middle;

[0024] Figure 4 This is a schematic diagram of the structure of the sealing heat insulation sheet of the utility model.

[0025] In the figure: 1-glass tube body, 2-reaction chamber, 3-sealing heat insulation plate, 301-main spacer, 302-side spacer, 303-connecting plate, 304-integrated ring, 305-connecting groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example:

[0028] See also Figure 1-4 The utility model provides the following technical solutions: a glass tube for chemical experiments, comprising a glass tube body 1, wherein the glass tube body 1 is symmetrically and integrally formed with reaction chambers 2, wherein different reactants can be placed in the two reaction chambers respectively, for example, in the experimental operation of distinguishing sodium carbonate from sodium bicarbonate, sodium carbonate and sodium bicarbonate are added to the two reaction chambers 2 respectively, wherein the reaction chamber 2 is an arc-shaped cavity structure, wherein the arrangement of the arc-shaped cavity structure is convenient for placing reactants from any position and angle, and the reactants can fall into the bottom of the arc-shaped cavity along the inner arc surface, wherein the two ends of the glass tube body 1 are open structures, wherein the reactants can be delivered into the corresponding reaction chambers along the openings of the glass tube body 1, and the gases generated by the reactants during the heating process can also be transmitted out through the openings of the glass tube body 1, wherein the glass A sealing heat-insulating sheet 3 is fixedly connected to the inner wall of the glass tube body 1 and located between the two reaction chambers 2. The sealing heat-insulating sheet 3 seals and insulates the two reaction chambers 2, so that the two reaction chambers 2 are independent of each other to prevent mutual influence. The sodium carbonate and sodium bicarbonate in the two reaction chambers 2 are heated. According to different thermal stabilities, the generated gas can be introduced into clarified lime water. The sample that can make the clarified lime water turbid is sodium bicarbonate. A carbon dioxide sensor can also be provided at the opening of the glass tube body 1 to monitor the generation of carbon dioxide. The sample with the generation of carbon dioxide is sodium bicarbonate. The glass tube for chemical experiments simplifies the arrangement, operation and subsequent cleaning of experimental instruments for distinguishing sodium carbonate and sodium bicarbonate, providing convenience for the experiment.

[0029] Specifically, the sealing insulation sheet 3 includes a main partition 301 and a side partition 302. The number of the side partitions 302 is 2. The two side partitions 302 are respectively located on both sides of the main partition 301. The main partition 301 and the side partitions 302 are arranged between the two reaction chambers 2 to form a three-layer sealing structure, which seals and insulates the two reaction chambers 2, so that the two reaction chambers 2 are independent and prevent mutual influence.

[0030] Specifically, the main spacer 301 and the side wing spacer 302 are fixedly connected via a connecting plate 303 , and the main spacer 301 and the side wing spacer 302 are connected together via the connecting plate 303 to form an integrated structure, which is convenient for unified fixed installation in the glass tube body 1 .

[0031] Specifically, an integrated ring 304 is provided on the circumferential side of the main spacer 301 and the side wing spacer 302, and the circumferential side walls of the main spacer 301 and the side wing spacer 302 are fixedly connected to the integrated ring 304, and the integrated ring 304 is fixedly connected to the inner wall of the glass tube body 1. The setting of the integrated ring 304 further enhances the overall unity of the sealing thermal insulation sheet 3, and facilitates the unified and fixed installation of the sealing thermal insulation sheet 3 in the glass tube body 1.

[0032] Specifically, a connecting groove 305 is symmetrically integrally formed on the inner side wall of the integrated ring 304, and the peripheral side wall of the wing spacer 302 is inserted into the corresponding connecting groove 305 and fixedly connected to the connecting groove 305. The setting of the connecting groove 305 increases the connection firmness between the wing spacer 302 and the integrated ring 304.

[0033] Specifically, the space enclosed by the main spacer 301 , the side wing spacer 302 and the integrated ring 304 is a heat-insulating space, and the heat-insulating space is filled with heat-insulating fillers, and the heat-insulating fillers further improve the heat-insulating property of the sealing heat-insulating sheet 3 .

[0034] Working principle: a glass tube body 1 is provided, and a reaction chamber 2 is symmetrically formed on the glass tube body 1. Different reactants can be placed in the two reaction chambers respectively. In the experimental operation of distinguishing sodium carbonate and sodium bicarbonate, sodium carbonate and sodium bicarbonate are added to the two reaction chambers 2 respectively. The reaction chamber 2 is an arc-shaped cavity structure. The setting of the arc-shaped cavity structure is convenient for placing reactants from any position and angle. The reactants can fall into the bottom of the arc-shaped cavity along the inner arc surface. The two ends of the glass tube body 1 are open structures, and the reactants can be sent into the corresponding reaction chambers along the openings of the glass tube body 1. The gas generated by the reactants during the heating process will also pass through the glass tube The opening of the main body 1 transmits that a sealing heat-insulating sheet 3 is fixedly connected to the inner wall of the glass tube main body 1 and is located between the two reaction chambers 2. The sealing heat-insulating sheet 3 seals and insulates the two reaction chambers 2, so that the two reaction chambers 2 are independent of each other to prevent mutual influence. The sodium carbonate and sodium bicarbonate in the two reaction chambers 2 are heated. According to the different thermal stability, the generated gas can be introduced into clarified lime water, among which the sample that can make the clarified lime water turbid is sodium bicarbonate. A carbon dioxide sensor can also be set at the opening of the glass tube main body 1 to monitor the generation of carbon dioxide. The sample with the generation of carbon dioxide is sodium bicarbonate.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A glass tube for chemical experiments, characterized in that: The invention comprises a glass tube body (1), a reaction chamber (2) is symmetrically integrally formed on the glass tube body (1), the reaction chamber (2) is an arc-shaped chamber structure, both ends of the glass tube body (1) are open structures, and a sealing heat-insulating sheet (3) is fixedly connected to the inner side wall of the glass tube body (1) and located between the two reaction chambers (2).

2. A glass tube for chemical experiments according to claim 1, characterized in that: The sealing heat-insulating sheet (3) comprises a main sheet (301) and a wing sheet (302), wherein the number of the wing sheets (302) is 2, and the two wing sheets (302) are respectively located on both sides of the main sheet (301).

3. A glass tube for chemical experiments according to claim 2, characterized in that: The main partition (301) and the side wing partition (302) are fixedly connected via a connecting plate (303).

4. A glass tube for chemical experiments according to claim 3, characterized in that: An integrated ring (304) is provided on the circumferential side of the main spacer (301) and the side wing spacer (302); the circumferential side walls of the main spacer (301) and the side wing spacer (302) are fixedly connected to the integrated ring (304); and the integrated ring (304) is fixedly connected to the inner side wall of the glass tube body (1).

5. A glass tube for chemical experiments according to claim 4, characterized in that: A connecting groove (305) is symmetrically integrally formed on the inner side wall of the integrated ring (304), and the peripheral side wall of the wing spacer (302) is inserted into the corresponding connecting groove (305) and fixedly connected to the connecting groove (305).

6. A glass tube for chemical experiments according to claim 5, characterized in that: The space enclosed by the main spacer (301), the side wing spacer (302) and the integrated ring (304) is a heat-insulating space, and the heat-insulating space is filled with heat-insulating fillers.

Images