Electrochemical demonstrator employing ion exchange membrane method

Abstract

The invention discloses an electrochemical demonstrator employing an ion exchange membrane method, comprising an anode chamber (1) and a cathode chamber (2), which are communicated with each other, wherein an ion exchange membrane is detachably arranged inside a third channel (14) communicating the anode chamber (1) and the cathode chamber (2); the anode chamber (1) and the cathode chamber (2) are respectively provided with an anode wiring pipe (11) and a cathode wiring pipe (21), and an injection pipe (12) and an exhaust pipe (13) are arranged at the top parts of the anode chamber (1) and / or the cathode chamber (2). The resistance of an electrode in the experiment process can be kept to be constant all the time by the structure. The demonstrator greatly increases the efficiency and stability of electrolyzing saturated salt water in comparison with the demonstrator in the prior art.

Description

technical field [0001] The invention relates to the field of electrochemical technology, in particular to an ion-exchange membrane method electrochemical demonstration instrument. Background technique [0002] Electrolysis experiments and primary battery experiments are experiments that are often demonstrated in chemistry experiment teaching. The primary battery is a device that converts chemical energy into electrical energy. Its working principle is to divide the spontaneous oxidation and reduction reactions into negative and positive two stages simultaneously. Electrons flow from the negative electrode to the positive electrode, and anions move to the negative electrode in the electrolyte solution. , the cations move to the positive electrode in the electrolyte solution, thereby forming a closed circuit and generating electric current. The electrolytic cell is a device that converts electrical energy into chemical energy. Its working principle is that the electrolyte ion...

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Problems solved by technology

[0005] It can be seen that the electrolysis demonstration instrument with the above structure can complete the demonstration instrument of electrolysis of saturated saline, but in the process of the experiment, due to the continuous reaction and reduction of the saline, the liquid level of the saline gradually decreases, so the cathode row and The anode row cannot be immersed in the solution during the entire reaction process, resulting in changes in the resistance of the entire device, which affects the electrolysis efficiency

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