Consider a voltaic cell that corresponds to the following reaction: Mg(s)+ Sn²⁺(aq)→ Mg²⁺(aq)+ Sn(s)Which of the following statements is correct?

Question

Quizplus · Accepted Answer

In the given reaction, magnesium is oxidized to Mg²⁺ and tin is reduced to Sn. In all voltaic cells, reduction occurs at the cathode and oxidation occurs at the anode. Therefore, tin is the cathode and the correct answer is (D). Choice (A) is incorrect because Mg is losing electrons and undergoing oxidation, so it cannot be the oxidizing agent. Choice (B) is incorrect because the tin electrode must be in the half-cell with the Sn²⁺ solution since it is the cathode. Choice (C) is incorrect because a salt bridge is necessary for the flow of ions to maintain electrical neutrality in the half-cell solutions. Choice (E) is incorrect because two electrons are transferred per atom of magnesium that reacts, not four.

Consider a Voltaic Cell That Corresponds to the Following Reaction