Question

Complete and state whether the reaction is oxidation or reduction.

\[\ce{Sn^{4+} +}\] .......... \[\ce{-> Sn^{2+}}\]

Answer 1

\[\ce{Sn^{4+} + 2e- -> Sn^{26}}\]

Tin changes from +4 to +2 oxidation state. This decrease means it gains 2 electrons. Since gaining an electron is a reduction reaction, hence this reaction is a reduction reaction.