1.

(i) MnO_(4)^(-) +Sn^(2+)to Mn^(2+)+Sn^(4+)

Answer»

Solution :
EQUALISE the increase/ decrease in O.N by multiplying the oxidant and REDUCTANT by suitable numbers.
`2MnO_(4)^(-) +5Sn^(2+) to 2Mn^(2+)+5Sn^(4+)`
Balance all other atoms exceptO and H
`2MnO_(4)^(-) +5Sn^(2+)to 2Mn^(2+)+5Sn^(4+)`
Balance O atom by adding water on the SIDE falling short of oxygen atoms.
`2MnO_(4)^(-)+5Sn^(2+) to 2Mn^(2+) +Sn^(4+)+8H_(2)O`
Balance H atom by adding `H+` on the side falling short of hydrogen atoms.
`2MnO_(4)^(-)+5Sn^(2+) 16 H^(+) to 2Mn^(2+) +5Sn^(4+)+8H_(2)O`


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