Question:
Define reference electrode. Write functions of salt bridge. Draw neat, labelled diagram of standard hydrogen electrode (SHE).
Define reference electrode. Write functions of salt bridge. Draw neat, labelled diagram of standard hydrogen electrode (SHE).
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Updated On: Nov 6, 2025
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Solution and Explanation
Step 1: Definition of Reference Electrode:
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:
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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