The complete balance reaction is 2Cu2++4I−→2CuI+I2 Cul further reacts to form Cu2I2. Moles of Cu2+ ‌=‌ Volume × concentration ‌ ‌=0.1L×0.05=0.005mol Moles of I−=IL×0.1=0.1mol2 moles of Cu2+ react with 4 moles of I−. Ratio of Cu2+ to I−required is ‌
2
4
=‌
1
2
Ratio of available Cu2+ to I−=0.05. Since 0.05<0.5. Thus, Cu2+ is limiting reactant. From the stoichiometry, 2 moles of Cu2+ produces 1 moles of I2 ‌ Moles of ‌I2‌=‌
1
2
×‌ moles of ‌Cu2+=‌
0.005
2
‌=0.0025mol ‌=2.5×10−3 From the stoichiometry, 2 moles of Cu2+ produces 2 moles of Cul and 2 moles of Cul produces 1 mole of Cu2I2. Thus, 2 moles of Cu2+ produces 1 mole of Cu2I2 moles of Cu2I2=‌