In acidic solution, the iodate ion can be used to react with a number of metal i

Question

In acidic solution, the iodate ion can be used to react with a number of metal ions. One such reaction is IO3?(aq)+Sn2+(aq)?I?(aq)+Sn4+(aq) Since this reaction takes place in acidic solution, H2O(l) and H+(aq) will be involved in the reaction. Places for these species are indicated by the blanks in the following restatement of the equation: IO3?(aq)+Sn2+(aq)+     ????I?(aq)+Sn4+(aq)+     ???What are the coefficients of the reactants and products in the balanced equation above? Remember to include H2O(l) and H+(aq) in the appropriate blanks. Your answer should have six terms.

Explanation / Answer

IO3?(aq)+Sn2+(aq)?I?(aq)+Sn4+(aq)

first half reaction

IO3^- .........>I-

IO3^- + 6H+ +6e-.........>I- + 3H2O............1

second half reaction

Sn+2 .......> Sn+4

Sn+2 .......> Sn+4 + 2e- .................2

do eq1. + eq.2 *3

3Sn+2 + IO3^- + 6H+ .......> 3Sn+4 + I- + 3H2O

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