In an electrolytic cell, a salt bridge is used in order to:
Correct answer: D. Allow movement of ions between two half-cells
- A. Pass the electric current
- B. Mix solution of two half-cells
- C. Prevent the flow of ions
- D. Allow movement of ions between two half-cells
Explanation
A salt bridge is used to connect the oxidation and reduction half-cells of a galvanic cell (voltaic cell), a type of electrochemical cell. It maintains electrical neutrality within the internal circuit, preventing the cell from rapidly running its reaction to equilibrium. The cations, positive ions, flow toward the cathode to replace the cations that are being picked up at the electrode. The anions, negative ions, flow toward the anode to balance the positive charge of the cations that are released from the electrode.
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