In an electrochemical cell, oxidation always takes place at the
Correct answer: C. anode
- A. cathode
- B. salt bridge
- C. anode
- D. voltmeter
Explanation
The anode is by definition the electrode at which oxidation occurs and reduction occurs at the cathode, and this holds for both galvanic and electrolytic cells. What changes between the two is the sign, since the anode is negative in a galvanic cell but positive in electrolysis. Remembering the definitions by process rather than by sign avoids the usual confusion.
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About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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