AP Chemistryeasymcq1 pt
What does the salt bridge do in a galvanic cell?
A.Completes the circuit with migrating ions
B.Carries electrons between half-cells
C.Prevents the reaction from reaching equilibrium
D.Adds reactants to the cell
Explanation
Core Concept
As electrons flow, charge would build up in each half-cell; the salt bridge's ions migrate to neutralize that buildup, keeping current flowing.
Correct Answer
ACompletes the circuit with migrating ions
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