CN219267165U - Electrolytic cell experimental device for high school electrochemical teaching - Google Patents
Electrolytic cell experimental device for high school electrochemical teaching Download PDFInfo
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- CN219267165U CN219267165U CN202223135378.1U CN202223135378U CN219267165U CN 219267165 U CN219267165 U CN 219267165U CN 202223135378 U CN202223135378 U CN 202223135378U CN 219267165 U CN219267165 U CN 219267165U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The utility model discloses an electrolytic cell experimental device for high-school electrochemical teaching in the field of electrolytic experiment teaching devices, which comprises a storage rack, wherein a large electrolytic cell is arranged at the upper end of the storage rack, a small electrolytic cell is arranged in the large electrolytic cell, one side of the small electrolytic cell is provided with a hole, and a cation exchange membrane is adhered on the hole; the holes at the upper ends of the first needle cylinder and the second needle cylinder are connected with air pipes, water stop clamps are arranged on the two air pipes, and the lower ends of the first electrode and the second electrode are respectively connected with the positive electrode and the negative electrode of the power supply; the experimental device takes raw materials, activates and can recycle electrolyte, so that the cost is reduced, and more students can participate in the experiment; the gas generated by electrolysis can be separated, so that the generated gas can be qualitatively and quantitatively analyzed conveniently, and gas mixing explosion is avoided; the cation exchange membrane is skillfully fixed near the cathode, and the electrode product is purified, which is close to the actual production situation of chlor-alkali industry.
Description
Technical Field
The utility model relates to the field of electrolytic experiment teaching devices, in particular to an electrolytic cell experiment device for high school electrochemical teaching.
Background
Electrochemical is a core concept for high school chemistry teaching. The electrode, the battery and the electrolyte form a closed loop to convert electric energy into chemical energy, and the electrolytic cell is not only an important point of electrochemical teaching, but also has important application in industrial production. The experiment can cultivate the learning interest of students, and the visual experimental phenomenon can help students to consolidate and understand knowledge. At present, some existing experimental devices do not separate the electrolysis products of chlorine and hydrogen, so that the experimental risk coefficient is high, recycling and inspection are not facilitated, the cost of the experimental devices is high, each student can directly operate, and the participation of the students is not strong.
Therefore, it is highly desirable to provide an electrolytic cell experimental device for high school electrochemical teaching to solve the above technical problems.
Disclosure of Invention
The utility model aims to provide an electrolytic cell experimental device for high-school electrochemical teaching, which is prepared from raw materials, is activated, can recycle electrolyte, reduces cost and enables more students to participate in experiments; the gas generated by electrolysis can be separated, so that the generated gas can be qualitatively and quantitatively analyzed conveniently, and gas mixing explosion is avoided; the cation exchange membrane is skillfully fixed near the cathode, and the electrode product is purified, which is close to the actual production situation of chlor-alkali industry.
In order to achieve the above purpose, the utility model provides an electrolytic cell experimental device for high school electrochemical teaching, which comprises a storage rack, wherein a large electrolytic tank for containing first electrolyte is arranged at the upper end of the storage rack, a small electrolytic tank for containing second electrolyte is arranged in the large electrolytic tank, one side of the small electrolytic tank is provided with a hole, and a cation exchange membrane is adhered on the hole;
the large electrolytic tank and the small electrolytic tank are respectively provided with a first electrode and a second electrode which vertically penetrate through the tank body, the first electrode and the second electrode are respectively covered with a first needle cylinder and a second needle cylinder, the outer edges of the bottom ends of the first needle cylinder and the second needle cylinder are respectively and fixedly provided with at least two suckers, holes at the upper ends of the first needle cylinder and the second needle cylinder are respectively connected with an air pipe, the two air pipes are respectively provided with a water stop clamp, and the lower ends of the first electrode and the second electrode are respectively connected with the positive electrode and the negative electrode of a power supply;
the first needle cylinder is identical with the second needle cylinder, the height of the large electrolytic tank is slightly larger than that of the first needle cylinder, the height of the small electrolytic tank is slightly larger than that of the second needle cylinder, the height of the upper end of the first electrode is larger than that of the lower end of the first needle cylinder, and the height of the upper end of the second electrode is larger than that of the lower end of the second needle cylinder.
Preferably, the commodity shelf comprises a table plate and supporting legs fixedly connected to the lower end of the table plate, and the large electrolytic tank is arranged at the upper end of the table plate.
Preferably, the air tube may be provided as a flexible latex tube.
Preferably, the first electrode and the second electrode are graphite electrodes.
Preferably, the middle part of the graphite electrode is wrapped with a wooden sleeve.
Preferably, the length of the wooden sleeve is 0.6-0.75 times of the length of the graphite electrode.
Preferably, the cation exchange membrane is arranged on one side of the small electrolytic cell close to the first needle cylinder.
Preferably, a pH sensor is also arranged in the small electrolytic cell.
Preferably, the large electrolytic cell and the small electrolytic cell are both made of plastic materials.
According to the technical scheme, the large electrolytic tank and the small electrolytic tank are used, and the electrolysis products are separated and purified through the cation exchange membrane, so that the industrial production situation is simulated, the electrolyte can be reused, the cost is reduced, and more students can participate in experiments; simultaneously, two needle cylinders are used for respectively covering two electrodes, so that generated gas generated by electrolysis is separated to facilitate qualitative and quantitative analysis of generated gas, and gas mixing explosion is avoided.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:
FIG. 1 is a schematic diagram of the structure of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the connection structure of a small electrolytic cell and a cation exchange membrane in the utility model;
FIG. 3 is a schematic representation of the use of the present utility model in quantitative analysis;
FIG. 4 is a schematic representation of the use of the present utility model in qualitative analysis.
Description of the reference numerals
1-rack, 2-power supply, 3-second electrode, 4-small electrolytic cell, 5-big electrolytic cell, 6-pH sensor, 7-second cylinder, 8-water stop clamp, 9-first electrolyte, 10-cation exchange membrane, 11-sucking disc, 12-first electrode, 13-first cylinder, 14-trachea, 15-second electrolyte, 16-wooden cover.
Detailed Description
The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.
The utility model provides an electrolytic cell experimental device for high school electrochemical teaching, which comprises a storage rack 1, wherein a large electrolytic tank 5 for containing a first electrolyte 9 is arranged at the upper end of the storage rack 1, a small electrolytic tank 4 for containing a second electrolyte 15 is arranged in the large electrolytic tank 5, one side of the small electrolytic tank 4 is provided with a hole, and a cation exchange membrane 10 is adhered on the hole;
the large electrolytic tank 5 and the small electrolytic tank 4 are respectively provided with a first electrode 12 and a second electrode 3 which vertically penetrate through the tank body, the first electrode 12 and the second electrode 3 are respectively covered with a first needle cylinder 13 and a second needle cylinder 7, at least two suckers 11 are respectively and fixedly arranged at the outer edges of the bottom ends of the first needle cylinder 13 and the second needle cylinder 7, the holes at the upper ends of the first needle cylinder 13 and the second needle cylinder 7 are respectively connected with an air pipe 14, the two air pipes 14 are respectively provided with a water stop clamp 8, and the lower ends of the first electrode 12 and the second electrode 3 are respectively connected with the positive electrode and the negative electrode of the power supply 2;
the first needle cylinder 13 is identical to the second needle cylinder 7, the height of the large electrolytic tank 5 is slightly larger than the height of the first needle cylinder 13, the height of the small electrolytic tank 4 is slightly larger than the height of the second needle cylinder 7, the height of the upper end of the first electrode 12 is larger than the height of the lower end of the first needle cylinder 13, and the height of the upper end of the second electrode 3 is larger than the height of the lower end of the second needle cylinder 7.
The micro electrolytic cell experimental device for high school electrochemistry teaching can be used for quantitatively analyzing gas generated by electrolytic reaction, and is concretely as follows:
the first electrolyte 9 and the second electrolyte 15 are respectively injected into the large electrolytic tank 5 and the small electrolytic tank 4, and the first electrolyte 9 should be over the first electrode 12 and the cation exchange membrane 10, and the liquid level is slightly lower than the tank wall of the large electrolytic tank 5 but not higher than the small electrolytic tank 4. The second electrolyte 15 has a liquid level above the second electrode 3 and the cation exchange membrane 10 and a liquid level slightly below the walls of the small electrolytic cell 4. The first electrolyte 9 may be provided as saturated saline solution and the second electrolyte 15 may be provided as 0.1mol/L sodium hydroxide solution.
The water stop clamp 8 above the two needle tubes is opened, then the first needle cylinder 13 is reversely buckled in the large electrolytic tank 6, the liquid level in the first needle cylinder 13 and the liquid level in the large electrolytic tank 5 are kept horizontal by utilizing the atmospheric pressure, the first needle cylinder 13 is moved in the large electrolytic tank 5, the first needle cylinder 13 is moved to be above the first electrode 12, the first needle cylinder 13 covers the first electrode 12, the first needle cylinder 13 is pressed downwards, the sucker 11 is adsorbed at the bottom end of the large electrolytic tank 5, and then the first needle cylinder 13 is fixed in the large electrolytic tank 5. In the same way, the second needle cylinder 7 is fixed in the small electrolytic cell 4, with the second needle cylinder 7 covering the second electrode 3. The water stop clamps 8 above the two needle tubes are closed. The lower ends of the first electrode 12 and the second electrode 3 are respectively connected with the positive electrode and the negative electrode of the power supply 2, the electrolysis reaction starts, the gas generated by the first electrode 12 is chlorine, the gas generated by the second electrode 3 is hydrogen, and the generated gas can enter the first needle cylinder 13 and the second needle cylinder 7 respectively because the first needle cylinder 13 and the second needle cylinder 7 are respectively covered on the first electrode 12 and the second electrode 3, so that the detection is convenient, the gas mixed explosion is avoided, and the electrolyte can be recycled due to the arrangement of the cation exchange membrane 10, so that the cost is further reduced. After the gas enters the first needle cylinder and the second needle cylinder, the liquid level in the first needle cylinder and the second needle cylinder is reduced, and the gas generated by the electrolytic reaction can be quantitatively analyzed according to the liquid level of the electrolyte in the first needle cylinder and the second needle cylinder.
The micro electrolytic cell experimental device for high school electrochemistry teaching can be used for qualitatively analyzing gas generated by electrolytic reaction, and is concretely as follows:
the first electrolyte 9 and the second electrolyte 15 are respectively injected into the large electrolytic tank 5 and the small electrolytic tank 4, and the first electrolyte 9 should be over the first electrode 12 and the cation exchange membrane 10, and the liquid level is slightly lower than the tank wall of the large electrolytic tank 5 but not higher than the small electrolytic tank 4. The second electrolyte 15 has a liquid level above the second electrode 3 and the cation exchange membrane 10 and a liquid level slightly below the walls of the small electrolytic cell 4. The first electrolyte 9 may be provided as saturated saline solution and the second electrolyte 15 may be provided as 0.1mol/L sodium hydroxide solution.
The water stop clamp 8 above the two needle tubes is opened, then the first needle cylinder 13 is reversely buckled in the large electrolytic tank 6, the liquid level in the first needle cylinder 13 and the liquid level in the large electrolytic tank 5 are kept horizontal by utilizing the atmospheric pressure, the first needle cylinder 13 is moved in the large electrolytic tank 5, the first needle cylinder 13 is moved to be above the first electrode 12, the first needle cylinder 13 covers the first electrode 12, the first needle cylinder 13 is pressed downwards, the sucker 11 is adsorbed at the bottom end of the large electrolytic tank 5, and then the first needle cylinder 13 is fixed in the large electrolytic tank 5. In the same way, the second needle cylinder 7 is fixed in the small electrolytic cell 4, with the second needle cylinder 7 covering the second electrode 3. The water stop clamps 8 above the two needle tubes are closed. The lower ends of the first electrode 12 and the second electrode 3 are respectively connected with the positive electrode and the negative electrode of the power supply 2, after a period of time, the power supply 2 is disconnected, two water stop clamps 8 are opened, gas in the two needle cylinders can escape from the upper end of the gas pipe 14 due to the height difference between the liquid level in the needle cylinders and the liquid level in the electrolytic tank, and at the moment, the gas generated by the electrolytic reaction can be tested and qualitatively analyzed.
In this embodiment, the rack 1 comprises a table plate and supporting legs fixedly connected to the lower end of the table plate, and the large electrolytic tank 5 is arranged at the upper end of the table plate.
In this embodiment, the air pipe 14 may be a flexible latex pipe, and when the water stop clamp 8 is closed, the latex pipe deforms, the pipe is blocked, and no air can flow. When the water stop clamp 8 is opened, the latex tube recovers deformation, and the pipeline is communicated, so that gas can be circulated.
In the present embodiment, the first electrode 12 and the second electrode 3 are graphite electrodes.
In this embodiment, the middle of the graphite electrode is wrapped with a wooden sleeve 16, which is convenient for students to hold the graphite electrode up and down.
In this embodiment, the length of the wooden sleeve 16 is 0.6 to 0.75 times the length of the graphite electrode. The graphite electrode can be made of a pencil, wood shells at the upper end and the lower end of the pencil are cut off, the wood shells in the middle part are reserved, and the joint of the electrode and the electrolytic tank is sealed.
In this embodiment, the cation exchange membrane 10 is disposed on the side of the small cell adjacent to the first cylinder 13 to facilitate cation exchange in the first electrolyte 19 and the second electrolyte 15.
In this embodiment, the small electrolytic cell is further provided with a pH sensor 6, and the detection end of the pH sensor 6 should be immersed in the second electrolyte 15, so that the pH value in the second electrolyte 15 can be monitored in real time.
In the embodiment, the large electrolytic tank 5 and the small electrolytic tank 4 are both made of plastic materials, so that the manufacturing cost is low, the processing is easy, and the electrolytic reaction cannot be participated.
The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.
Claims (9)
1. The electrolytic cell experimental device for the high school electrochemical teaching is characterized by comprising a storage rack (1), wherein a large electrolytic tank (5) for containing a first electrolyte (9) is arranged at the upper end of the storage rack (1), a small electrolytic tank (4) for containing a second electrolyte (15) is arranged in the large electrolytic tank (5), a hole is formed in one side of the small electrolytic tank (4), and a cation exchange membrane (10) is adhered to the hole;
the large electrolytic tank (5) and the small electrolytic tank (4) are respectively provided with a first electrode (12) and a second electrode (3) which vertically penetrate through the tank body, the first electrode (12) and the second electrode (3) are respectively covered with a first needle cylinder (13) and a second needle cylinder (7), at least two suckers (11) are respectively and fixedly arranged at the outer edges of the bottom ends of the first needle cylinder (13) and the second needle cylinder (7), holes at the upper ends of the first needle cylinder (13) and the second needle cylinder (7) are respectively connected with an air pipe (14), the two air pipes (14) are respectively provided with a water stop clamp (8), and the lower ends of the first electrode (12) and the second electrode (3) are respectively connected with the positive electrode and the negative electrode of the power supply (2);
the height of the large electrolytic tank (5) is larger than that of the first needle cylinder (13), the height of the small electrolytic tank (4) is larger than that of the second needle cylinder (7), the height of the upper end of the first electrode (12) is larger than that of the lower end of the first needle cylinder (13), and the height of the upper end of the second electrode (3) is larger than that of the lower end of the second needle cylinder (7).
2. The electrolytic cell experimental device for high school electrochemical teaching according to claim 1, wherein the shelf (1) comprises a table plate and supporting legs fixedly connected to the lower end of the table plate, and the large electrolytic cell (5) is arranged at the upper end of the table plate.
3. Electrolytic cell experimental device for high school electrochemical teaching according to claim 1, characterized in that the air pipe (14) can be provided as a flexible latex pipe.
4. The electrolytic cell experimental device for high school electrochemical teaching according to claim 1, characterized in that the first electrode (12) and the second electrode (3) are graphite electrodes.
5. The electrolytic cell experimental device for high school electrochemical teaching according to claim 4, characterized in that the middle part of the graphite electrode is wrapped with a wooden sleeve (16).
6. The electrolytic cell experimental device for high school electrochemical teaching according to claim 5, characterized in that the length of the wooden sleeve (16) is 0.6-0.75 times the length of the graphite electrode.
7. The electrolytic cell experimental device for high school electrochemical teaching according to claim 1, characterized in that the cation exchange membrane (10) is arranged at one side of the small electrolytic cell (4) close to the first needle cylinder (13).
8. The electrolytic cell experimental device for high school electrochemistry teaching according to claim 1, wherein a pH sensor (6) is further arranged in the small electrolytic cell (4).
9. The electrolytic cell experimental device for high school electrochemical teaching according to claim 1, characterized in that the big electrolytic cell (5) and the small electrolytic cell (4) are both made of plastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223135378.1U CN219267165U (en) | 2022-11-24 | 2022-11-24 | Electrolytic cell experimental device for high school electrochemical teaching |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223135378.1U CN219267165U (en) | 2022-11-24 | 2022-11-24 | Electrolytic cell experimental device for high school electrochemical teaching |
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| Publication Number | Publication Date |
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| CN219267165U true CN219267165U (en) | 2023-06-27 |
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| CN202223135378.1U Active CN219267165U (en) | 2022-11-24 | 2022-11-24 | Electrolytic cell experimental device for high school electrochemical teaching |
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- 2022-11-24 CN CN202223135378.1U patent/CN219267165U/en active Active
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