Redox Reactions

\(20 \mathrm{~mL}\) of \(0.02\, \mathrm{M}\) hypo solution is used for the titration of \(10 \mathrm{~mL}\) of copper sulphate solution, in the presence of excess of KI using starch as an indicator. The molarity of \(\mathrm{Cu}^{2+}\) is found to be ____________ \(\times 10^{-2} \,\mathrm{M}\). [nearest integer]

Given : \(2 \,\mathrm{Cu}^{2+}+4 \,\mathrm{I}^{-} \rightarrow \mathrm{Cu}_{2} \mathrm{I}_{2}+\mathrm{I}_{2}\)

\(\mathrm{I}_{2}+2 \mathrm{~S}_{2} \mathrm{O}_{3}^{2-} \rightarrow 2 \mathrm{I}^{-}+\mathrm{S}_{4} \mathrm{O}_{6}^{2-}\)