A salt bridge in a galvanic cell:
AAllows ion migration to maintain electrical neutrality of the half-cells
BIncreases the cell resistance
CCarries electrons from cathode to anode
DIs the site of oxidation
Answer & Solution
Correct answer: A. Allows ion migration to maintain electrical neutrality of the half-cells
Salt bridge (KCl or KNO₃ in agar) supplies ions to **neutralize charge build-up** in each half-cell as the reaction proceeds — keeps the cell running. Without it, charge separation quickly stops the reaction. It does NOT carry electrons.
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