Calculate the percentage purity of a sample of bleaching powder from the following data: 14.3 g of a sample of bleaching powder when treated with acetic acid and excess of KI, liberated iodine which required 100 mL 1 M sodium thiosulphate solution: Ca(OCl)2+2CH3COOH→Ca(CH3COO)2+H2O+Cl2 Cl2+2KI→2KCl+I2 2Na2S2O3+I2→Na2S4O6+2NaI

Calculate the percentage purity of a sample of bleaching powder from t

1.	Calculate the percentage purity of a sample of bleaching powder from the following data: 14.3 g of a sample of bleaching powder when treated with acetic acid and excess of KI, liberated iodine which required 100 mL 1 M sodium thiosulphate solution: Ca(OCl)2+2CH3COOH→Ca(CH3COO)2+H2O+Cl2 Cl2+2KI→2KCl+I2 2Na2S2O3+I2→Na2S4O6+2NaI
Answer» Calculate the percentage purity of a sample of bleaching powder from the following data: 14.3 g of a sample of bleaching powder when treated with acetic acid and excess of KI, liberated iodine which required 100 mL 1 M sodium thiosulphate solution: $C a (O C l)_{2} + 2 C H_{3} C O O H \to C a (C H_{3} C O O)_{2} + H_{2} O + C l_{2}$ $C l_{2} + 2 K I \to 2 K C l + I_{2}$ $2 N a_{2} S_{2} O_{3} + I_{2} \to N a_{2} S_{4} O_{6} + 2 N a I$