Multiple Choice
Which of the following statements is TRUE for a voltaic cell, but FALSE for an electrolytic cell?
I. The flow of electrons is spontaneous.
II. Oxidation occurs at the anode.
III. Electrons flow from the anode to the cathode.
5. Classification & Balancing of Chemical Reactions
Galvanic Cell (Simplified)
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Which of the following statements is true for a salt bridge?
A
Contains neutral atoms that interact with the ions in both half-cell compartments.
B
Serves as a route through which ions can flow freely.
C
Serves as the site of oxidation.
D
Serves as the site of reduction.
Verified step by step guidance1
Understand the role of a salt bridge in an electrochemical cell: It is a device used to maintain electrical neutrality by allowing the flow of ions between the two half-cells.
Recognize that a salt bridge does not contain neutral atoms; instead, it contains a salt solution that dissociates into ions.
Identify that the primary function of a salt bridge is to allow ions to flow freely between the two half-cells, preventing charge buildup.
Clarify that oxidation and reduction occur at the electrodes, not within the salt bridge itself.
Conclude that the statement 'Serves as a route through which ions can flow freely' is true for a salt bridge, as it facilitates the movement of ions to maintain charge balance.
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