For the coagulation of 500 mL of arsenious sulphide sol, 2 ml of 1M NaCl is required. What i's the flocculation value of NaCl?

2mL of 1MNaCl contains NaCl=21000=2mmolThus 500 mL of AsrS3 sol require NaCl for complete coagulation = 2 m molHence 1 L, i.e., 1000 mL of the sol require NaCl for completecoagulation = 4 m molTherefore, flocculation value of NaCl = 4.