What is the role of the salt bridge in a galvanic cell?
Answer and explanation
Correct answer: A. It allows ions to move between the half-cells
- Step 1: Oxidation builds up positive charge at the anode and reduction leaves excess negative charge at the cathode.
- Step 2: Ions flowing through the salt bridge neutralise this, so the reactions can continue.
Answer
ions move to balance the charge.
Why not the others: Electrons travel through the external wire; electrodes do not move; the salt bridge supplies ions, not electrons.
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