Which of the following can give iodometric titration? | Chemistry | SolveeIt

Question

Which of the following can give iodometric titration?

$Fe ^{+3}$

$Cu ^{+2}$

$Pb ^{+2}$

$Ag ^{+2}$

Answer

$Cu ^{+2}$

Explanation

Solution

$2 Cu ^{2+}+2 I ^{-} \rightarrow Cu _{2} I _{2}+ I _{2} \uparrow$ $\underset{\text{thioslphate)}}{{2 S _{2} O _{3}{ }^{2-}+ I _{2} }}\rightarrow S _{4} O _{6}{ }^{2-}+2 I ^{-}$ Iodometric titration involves the evolution of iodine immediately before adding thiosulphate solution.

Chemistry Question on d -and f -Block Elements

Solution