Define reference electrode. Write functions of salt bridge. Draw neat, labelled diagram of standard hydrogen electrode (SHE).
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Solution and Explanation
A reference electrode is an electrode with a known and stable electrode potential, used as a reference to measure the potential of other electrodes. Example: Standard Hydrogen Electrode (SHE), with potential 0 V at standard conditions.
Step 2: Functions of Salt Bridge:
- Maintains electrical neutrality by allowing ion flow between half-cells, preventing charge buildup.
- Completes the electrical circuit, enabling current flow without mixing solutions.
Step 3: Diagram of SHE:
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