Chemical reaction experiment teaching aid and use method thereof

Abstract

The invention discloses a chemical reaction experiment teaching aid and a use method thereof, and belongs to the field of experiment teaching aids, the chemical reaction experiment teaching aid comprises a double-opening bottle, a rubber plug is arranged at one opening of the double-opening bottle, and a T-like tube is arranged at the other opening of the double-opening bottle; symmetrically-distributed wires penetrate through the rubber plug, the wires located on the outer side of the double-opening bottle are connected with a power module, the wires located on the inner side of the double-opening bottle are provided with electric clamps respectively, and an electric conduction and heat conduction device is arranged between the electric clamps. The T-like pipe is provided with a frosted opening connected with a bottle opening of the double-opening bottle, and a first inlet and outlet and a second inlet and outlet are formed in the side, away from the frosted opening, of the T-like pipe. According to the chemical reaction experiment teaching aid, through the combined design of the T-shaped tube and the double-opening bottle, the functions of the chemical reaction experiment teaching aid are diversified, multifunctional combination or expansion of chemical experiments can be carried out, and therefore design and development of the experiments are promoted.

Description

Technical Field

[0001] The invention relates to the field of experimental teaching aids, and in particular to a chemical reaction experimental teaching aid and a use method thereof. Background Art

[0002] For various chemical reaction processes, experimental teaching aids can be visualized. For example, using a chemical reaction demonstrator, the changes in substances, changes in color, generation of gases, generation of precipitation, and other phenomena in the reaction can be clearly displayed, allowing students to more truly observe the occurrence and progress of the reaction and deepen their understanding of the principles and laws of chemical reactions. In addition, chemical experiment teaching aids provide students with a material basis for practical operations. Students can master the basic skills and operating specifications of experiments and improve their hands-on ability by personally using various instruments and equipment, such as balances, measuring cylinders, burettes, etc., to perform operations such as weighing, measuring, and titration. In short, chemical experiment teaching aids play a vital role in chemical teaching and scientific research. However, the functions of some teaching aids are relatively single at present, and multifunctional combinations or expansions cannot be performed, which limits the design and development of experiments. Based on this, the present invention provides a chemical reaction experiment teaching aid and a method for using it. Summary of the invention

[0003] The purpose of the present invention is to provide a chemical reaction experiment teaching aid and a method of using the same to solve the above-mentioned problems.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention discloses a chemical reaction experiment teaching aid, comprising a double-mouth bottle, wherein a rubber plug is arranged at one of the bottle mouths of the double-mouth bottle, and a quasi-T-shaped tube is arranged at the other bottle mouth; symmetrically distributed wires are inserted through the rubber plug, the wires located outside the double-mouth bottle are connected to a power module, and the wires located inside the double-mouth bottle are respectively provided with electric clamps, and an electrical and heat conducting device is arranged between the electric clamps; the quasi-T-shaped tube is provided with a frosted port connected to the bottle mouth of the double-mouth bottle, and an inlet and outlet 1 and a second inlet and outlet are respectively arranged on the side of the quasi-T-shaped tube away from the frosted port.

[0006] Furthermore, the electrical and heat conducting device is made of metal or graphite.

[0007] Furthermore, a long-necked funnel is integrally formed inside the inlet and outlet 1, and a glass tube of the long-necked funnel passes downward through the T-tube and extends into the double-mouthed bottle; nozzles are integrally formed at the top of the long-necked funnel and the ends of the inlet and outlet 2.

[0008] Furthermore, the inlet and outlet 1 and the inlet and outlet 2 are respectively provided with a piston 1 and a piston 2.

[0009] Furthermore, the output voltages of the power module are 8V, 10V, 12V, and 16V respectively.

[0010] A chemical reaction experimental method:

[0011] Step 1, placing the reactant into a double-necked bottle;

[0012] Step 2: clamp the metal wire required for the experimental reaction on the electric clamp, and then seal the rubber plug on one of the two-mouth bottle;

[0013] Step 3, installing the T-shaped tube seal on the other bottle mouth of the double-mouth bottle;

[0014] Step 4, connecting the inlet and outlet 2 of the T-shaped pipe to the tail gas treatment equipment, and connecting the inlet and outlet 1 to the feeding equipment;

[0015] Step 5, opening piston 1 and piston 2, the liquid reactant enters the double-necked bottle from inlet and outlet 1, and undergoes a chemical reaction with the reactant to generate gas;

[0016] Step 6: After the gas fills the entire double-necked bottle, the power module is powered on, the metal wire instantly becomes red hot, and a chemical reaction occurs with the gas in the double-necked bottle;

[0017] Step seven, disconnect the power supply, and after the reaction stops, introduce the tail gas treatment solution into the double-necked bottle from the first inlet and outlet, and produce a chemical reaction with the tail gas in the double-necked bottle.

[0018] Furthermore, the metal wire in step 2 is made of Cu or Fe.

[0019] Furthermore, in step 5, piston 1 can introduce the gas generated by the reaction into the tail gas treatment equipment connected to inlet and outlet 2 to buffer the gas pressure in the double-necked bottle.

[0020] Furthermore, in the step 2, the substance required for the experimental reaction is a solid particle or powder structure, the solid particle or powder structure is placed on the graphite sheet, and then the two ends of the graphite sheet are clamped on the electric clamps respectively.

[0021] Compared with the prior art, the beneficial technical effects of the present invention are:

[0022] The combined design of the T-tube and the double-necked bottle of the chemical reaction experiment teaching aid of the invention makes it versatile and can carry out multifunctional combination or expansion of chemical experiments, thereby promoting the design and implementation of experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is the structural diagram of the chemical reaction experiment teaching aid of the present invention;

[0025] Figure 2 It is a T-type tube structure diagram;

[0026] Figure 3 It is the power circuit diagram;

[0027] Figure 4 For T-type pipe use structure Figure 2 ;

[0028] Figure 5 For T-type pipe use structure Figure 3 ;

[0029] Figure 6 For T-type pipe use structure Figure 4 ;

[0030] Explanation of the reference numerals: 1. double-mouth bottle; 2. rubber stopper; 3. wire; 4. electric clamp; 5. frosted mouth; 6. T-type tube; 7. inlet and outlet two; 8. piston one; 9. inlet and outlet one; 10. piston two; 11. glass tube. DETAILED DESCRIPTION

[0031] like Figure 1-3 As shown, a chemical reaction experiment teaching aid and a method of using the same include a double-mouth bottle 1, wherein a rubber stopper 2 is installed at one bottle mouth of the double-mouth bottle 1, and a T-shaped tube 6 is installed at the other bottle mouth.

[0032] The rubber plug 2 is interspersed with symmetrically distributed wires 3, the wires 3 located outside the two-mouth bottle 1 are connected to a power module, and the wires 3 located inside the two-mouth bottle 1 are respectively installed with electric clamps 4, and a conductive heat-conducting device is installed between the electric clamps 4. The conductive heat-conducting device is made of metal or graphite material, which can be a metal wire, a metal sheet or a graphite sheet, etc. The conductivity, thermal conductivity and high temperature resistance of graphite are utilized, and the solid on the graphite sheet can be ignited through graphite heat conduction. The power module provides voltages of different values ​​to achieve instantaneous red-hot ignition of the conductive heat-conducting device, replacing the traditional alcohol lamp heating method, which not only makes the experimental process safer, but also can achieve the purpose of environmental protection. The output voltages of the power module are 8V, 10V, 12V, and 16V respectively. Different voltages are used to convert electricity into heat to ignite solids in the experiment in order to meet the reaction temperature required for different reactions.

[0033] The T-shaped tube 6 is integrally formed with a frosted port 5 connected to the mouth of the double-mouth bottle 1, and the T-shaped tube 6 is integrally formed with an inlet and outlet 1 9 and an inlet and outlet 2 7 on one side away from the frosted port 5. Among them, the inlet and outlet 1 9 is connected to the feeding device or the tail gas treatment device; the inlet and outlet 2 7 is connected to the tail gas treatment device or the buffer gas pressure device, such as a balloon. In addition, the inlet and outlet 1 9 and the inlet and outlet 2 7 can also be used as gas inlets, which increases the flexibility of the experimental device and simplifies the structure of the experimental device, especially in some small and simple experimental devices, reducing the complexity and cost of the device. For example, in some reversible reaction experiments involving gas, the reaction may consume gas when it proceeds forward. At this time, external gas can enter through the inlet and outlet 1 9 / inlet and outlet 2 7 (as an air inlet) to supplement the consumption of gas and avoid too low air pressure in the reaction container. When the reaction is reversed to produce gas, the excess gas can be discharged from the inlet and outlet 1 9 / inlet and outlet 2 7 (as an air outlet) to prevent the air pressure in the container from being too high and causing danger, such as container rupture.

[0034] A long-necked funnel is integrally formed in the inlet and outlet 1 9, and the glass tube 11 of the long-necked funnel passes downward through the T-shaped tube 6 and extends into the double-mouth bottle 1. A nozzle is integrally formed at the top of the long-necked funnel and the end of the inlet and outlet 2 7, and the nozzle is used to connect the feeding equipment or the exhaust gas treatment equipment. The inlet and outlet 1 9 and the inlet and outlet 2 7 are respectively installed with a piston 1 8 and a piston 2 10.

[0035] Chemical reaction experiment method using chemical reaction experiment teaching aids:

[0036] Step 1, placing the reactant into a double-necked bottle 1;

[0037] Step 2: clamp the metal wire required for the experimental reaction on the electric clamp 4, and then seal the rubber plug 2 on one of the bottle openings of the double-mouth bottle 1;

[0038] Step 3, sealingly installing the T-shaped tube 6 on the other bottle mouth of the double-mouth bottle 1;

[0039] Step 4, connect the inlet and outlet 2 7 of the T-shaped pipe 6 to the tail gas treatment equipment, and connect the inlet and outlet 1 9 to the feeding equipment;

[0040] Step 5, open piston 1 8 and piston 2 10, and the liquid reactant enters the double-necked bottle 1 from inlet 1 9 and undergoes a chemical reaction with the reactant to produce gas;

[0041] Step 6: After the gas fills the entire double-necked bottle 1, the power module is powered on, the metal wire instantly becomes red hot, and a chemical reaction occurs with the gas in the double-necked bottle 1;

[0042] Step seven, disconnect the power supply, and after the reaction stops, allow the tail gas treated solution to enter the double-necked bottle 1 from the inlet and outlet 9, and produce a chemical reaction with the tail gas in the double-necked bottle 1.

[0043] The metal wire in step 2 is Cu or Fe.

[0044] In the step 5, the piston 1 8 can introduce the gas generated by the reaction into the tail gas treatment equipment connected to the inlet and outlet 2 7 to buffer the gas pressure in the double-necked bottle 1.

[0045] In the step 2, the substance required for the experimental reaction is a solid particle or powder structure. The solid particle or powder structure is placed on the graphite sheet, and then the two ends of the graphite sheet are clamped on the electric clamp 4 respectively.

[0046] Taking the reaction experiment of chlorine and metal as an example, the specific contents are as follows:

[0047] Step 1: Use a 5 ml syringe to take 2 ml of concentrated hydrochloric acid, use a 20 ml syringe to take 10 ml of pure water, set aside, and then use a 20 ml syringe to take 15 ml of sodium hydroxide;

[0048] Step 2: clamp the metal wire (Cu / Fe) to be reacted in the experiment on the electric clamp 4, add a spoonful of solid potassium chlorate into the double-necked bottle 1, and then plug it with a rubber stopper 2;

[0049] Step 3, install the T-shaped tube 6 on the double-necked bottle 1, put the concentrated hydrochloric acid syringe on the inlet and outlet 1 9 of the T-shaped tube 6, put the balloon on the inlet and outlet 2 7 of the T-shaped tube 6, open the piston 1 8 and the piston 2 10, inject the concentrated hydrochloric acid into the double-necked bottle 1, then close the piston 2 10, the concentrated hydrochloric acid reacts with the potassium chlorate solid to produce chlorine gas, and wait for the chlorine gas to fill the double-necked bottle 1;

[0050] Step 4: Connect the positive and negative electrodes of the wire 3 to the power supply, turn on the switch, and the metal wire on the clamp 4 instantly becomes red hot and reacts with the chlorine to produce brown-yellow smoke (or brown-red smoke). The reaction equation is:

[0051]

[0052] Step 5: Disconnect the power supply. After the reaction stops, inject pure water into the inlet and outlet 9 of the T-shaped tube 6. Observe the color of the solution. If the solution turns blue (containing Cu 2+ ) or the solution turns yellow (containing Fe 3+ ) Then inject sodium hydroxide solution into the feed pipe 9 to treat the tail gas.

[0053] In addition to the above method of adding reagents to the double-mouthed bottle to generate gas, the reaction gas can also be directly input from the T-type tube. For example, in the experiment of oxygen properties, the air exhaust method can be used to collect oxygen, and oxygen can be injected from the inlet and outlet 1 9 at the upper end of the T-type tube 6 using an oxygen bottle, and the air in the bottle can be discharged from the inlet and outlet 2 7. The fullness can be verified by burning a wooden stick with sparks at the mouth of the inlet and outlet 2 7. After the fullness is verified, the piston 1 8 and the piston 2 10 are closed, and the oxygen property experiment can be carried out by powering on. If the gas participating in the reaction has a lower density than air, the gas is injected from the inlet and outlet 2 7 at the right end of the T-type tube 6, and the air in the bottle is discharged from the inlet and outlet 1 9.

[0054] In addition to the above solid-gas combustion experiment, this type of T-tube 6 can be used with a frosted test tube or flask as a reaction device or gas collection device (such as Figure 4-6 shown).

[0055] In short, this device can carry out multiple combination experiments, and the experimental phenomena are obvious, the operation is simple, and the experiment is integrated and environmentally friendly. Students can deepen their understanding and memory of knowledge points through experiments, and the experimental process avoids air pollution. At the same time, electric heating is used instead of traditional alcohol lamp heating. The integration of disciplines to improve experiments can stimulate students' curiosity and cultivate their innovative thinking.

[0056] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A chemical reaction experiment teaching aid, characterized in that: The invention comprises a double-mouthed bottle (1), wherein a rubber plug (2) is arranged at one of the mouths of the double-mouthed bottle (1), and a quasi-T-shaped tube (6) is arranged at the other mouth of the bottle; symmetrically distributed wires (3) are inserted through the rubber plug (2), the wires (3) located outside the double-mouthed bottle (1) are connected to a power module, and the wires (3) located inside the double-mouthed bottle (1) are respectively provided with electric clamps (4), and an electric conductive and heat conductive device is arranged between the electric clamps (4); the quasi-T-shaped tube (6) is provided with a frosted mouth (5) connected to the mouth of the double-mouthed bottle (1), and an inlet and outlet 1 (9) and an inlet and outlet 2 (7) are respectively arranged on the side of the quasi-T-shaped tube (6) away from the frosted mouth (5).

2. The chemical reaction experiment teaching aid according to claim 1, characterized in that: The electrical and heat conducting device is made of metal or graphite.

3. The chemical reaction experiment teaching aid according to claim 1, characterized in that: A long-necked funnel is integrally formed inside the inlet and outlet 1 (9), and a glass tube (11) of the long-necked funnel passes downward through the T-shaped tube (6) and then extends into the double-mouthed bottle (1); nozzles are integrally formed at the top of the long-necked funnel and at the end of the inlet and outlet 2 (7).

4. The chemical reaction experiment teaching aid according to claim 1, characterized in that: The inlet and outlet 1 (9) and the inlet and outlet 2 (7) are respectively provided with a piston 1 (8) and a piston 2 (10).

5. The chemical reaction experiment teaching aid according to claim 1, characterized in that: The output voltages of the power modules are 8V, 10V, 12V, and 16V respectively.

6. A chemical reaction experiment method, using the chemical reaction experiment teaching aids according to claims 1-5, characterized in that: Step 1, placing the reactant into a double-necked bottle (1); Step 2: clamp the metal wire required for the experimental reaction onto the electric clamp (4), and then seal the rubber plug (2) onto one of the two-mouthed bottle (1); Step 3, sealingly installing the T-shaped tube (6) on the other bottle mouth of the double-mouth bottle (1); Step 4: Connect the second inlet and outlet (7) of the T-shaped tube (6) to the tail gas treatment equipment, and connect the first inlet and outlet (9) to the feed equipment; Step 5, opening piston 1 (8) and piston 2 (10), the liquid reactant enters the double-necked bottle (1) from inlet and outlet 1 (9), and undergoes a chemical reaction with the reactant to generate gas; Step 6: After the gas fills the entire double-necked bottle (1), the power module is powered on, and the metal wire instantly becomes red hot, generating a chemical reaction with the gas in the double-necked bottle (1); Step seven, disconnect the power supply, and after the reaction stops, allow the tail gas treatment solution to enter the double-necked bottle (1) from the first inlet and outlet (9), and produce a chemical reaction with the tail gas in the double-necked bottle (1).

7. The chemical reaction experimental method according to claim 6, characterized in that: The metal wire in step 2 is Cu or Fe.

8. The chemical reaction experimental method according to claim 6, characterized in that: In the step 5, the piston 1 (8) can introduce the gas generated by the reaction into the tail gas treatment equipment connected to the inlet and outlet 2 (7) to buffer the gas pressure in the double-necked bottle (1).

9. The chemical reaction experimental method according to claim 6, characterized in that: In the step 2, the substance required for the experimental reaction is a solid particle or a powder structure. The solid particle or the powder structure is placed on a graphite sheet, and then the two ends of the graphite sheet are clamped on the electric clamp (4) respectively.

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