2al + 3sn²⁺ → 2al³⁺ + 3sn\nin the voltaic cell above, which letter represents the cathode half - cell?
2al + 3sn²⁺ → 2al³⁺ + 3sn\nin the voltaic cell above, which letter represents the cathode half - cell?
Answer
Brief Explanations:
In a voltaic cell, the cathode is where reduction occurs. The given reaction is (2\text{Al} + 3\text{Sn}^{2+} \rightarrow 2\text{Al}^{3+} + 3\text{Sn}). Here, (\text{Sn}^{2+}) gains electrons (is reduced) to form (\text{Sn}). The half - cell with the (\text{Sn}) electrode (beaker A) is where the reduction of (\text{Sn}^{2+}) takes place, so it is the cathode half - cell.
Answer:
A (the beaker with the Sn electrode)