2.5 g sample of copper is dissolved in excess of H2SO4 to prepare 100 ml of 0.02MCuSO4(aq). 10 ml of 0.02M solution of CuSO4(aq) is mixed with excess of KI to show the following changes:
CuSO4+2KI⟶K2SO4+CuI2
2CuI2⟶Cu2I2+I2
The liberated iodine is titrated with hypo (Na2S2O3) which requires V ml of 0.1M hypo solution for its complete reduction.
The volume (
V) of hypo required is: