Question

Identify each of the following half-reactions as either an oxidation half-reaction or a reduction half-reaction. half-reaction identification Sn2 (aq) 2e-Sn(s) reduction Al(s)Al3 (aq) 3e- oxidation (2) Write a balanced equation for the overall redox reaction. Use smallest possible integer coefficients.

Answer 1

Answer: Oxidation reaction:  $Al(s)\rightarrow Al^{3+}(aq)+3e^-$

Reduction reaction:  $Sn^{2+}(aq)+2e^-\rightarrow Sn(s)$

Overall redox reaction : $2Al(s)+3Sn^{2+}(aq)\rightarrow 2Al^{3+}(aq)+3Sn(s)$

Explanation:

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

$Al(s)\rightarrow Al^{3+}(aq)+3e^-$

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

$Sn^{2+}(aq)+2e^-\rightarrow Sn(s)$

Overall redox reaction : $2Al(s)+3Sn^{2+}(aq)\rightarrow 2Al^{3+}(aq)+3Sn(s)$