| Themes > Science > Chemistry > General Chemistry > Solution and Solubility > Solubility and Redox Reactions > Galvanic Cells > Using The Power |
How do we use the power created by the cells? Well, to harness the power, we must separate the reducing agent and oxidation agent (so we can control the reaction) because if we don’t, the reaction would be spontaneous and we could not control what is happening. We then connect the two substances together using a wire. Then we must finish the connection by connecting the two solutions together using a salt bridge. A salt bridge is a connection between the two liquids that allow ions to move freely between the two solutions and keep each solution neutral. A salt bridge can be:
Batteries have positive and negative terminals, and batteries are a kind of galvanic cell, so galvanic cells must have positive and negative terminals. The positive electrode in the galvanic cell, where the oxidation takes place is called that anode. The anode is also the place where electrons are lost. The negative electrode in the galvanic cell, where the reduction takes place is called the cathode. The cathode is the place where the electrons are received. |
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