In a coagulation experiment , a sol of As_2S_3 is mixed with distilled water and 0.2m solution of an electrolyte, AB so that total volume is 20 mL. It was found that all solutions containing more than 4.5mL of AB get coagulated within two minutes.What is the flocculation value of AB for As_2S_3 ?

In a coagulation experiment , a sol of As_2S_3 is mixed with distilled

1.	In a coagulation experiment , a sol of As_2S_3 is mixed with distilled water and 0.2m solution of an electrolyte, AB so that total volume is 20 mL. It was found that all solutions containing more than 4.5mL of AB get coagulated within two minutes.What is the flocculation value of AB for As_2S_3 ?
Answer» Solution :Conc. of AB = 0.2 m VOLUME of AB required to coagulate 20 mL solution =4.5mL Amount of AB required to COAGULATED 20 mL solution `= (4.5 XX 0.2)/(1000) " moles " = (4.5 xx 0.2)/(1000) xx 1000` millimoles = 0.9 millimoles Millimoles of AB reqiured to coagulate 1 litre solution `= (0.9 xx 1000)/( 20 " for " As_2S_3) = 45` `:. ` FLOCCULATION value of AB =45