Complete and balance the overall redox reaction, ensure that you include ion charges.

Question

A sample of pure tin metal is dissolved in nitric acid to produce a solution containing Sn²⁺. This tin solution is then titrated with a solution of KMnO₄

a.    Complete and balance the overall redox reaction, ensure that you include ion charges.

Answer 1

Tin metal = Sn

Nitric acid = HNO3

The reaction will be between Sn2+ + MnO4- in an acid (HNO3) environment.

Sn²⁺ ==> Sn⁴⁺ + 2e- oxidation half reaction

MnO₄^- ==> Mn²⁺ reduction half reaction

Sn²⁺ ==> Sn⁴⁺ + 2e- ... multiply by 5 to equalize electrons

MnO₄^- + 8H+ 5e- ==> Mn²⁺ + 4H2O ... multiply by 2 to equalize electrons

5Sn²⁺ + 2MnO₄^- + 16H⁺ + 10e- ==> 5Sn⁴⁺ + 2Mn²⁺ + 8H₂O balanced redox for mass and charge