Colloids can be converted into precipitate on the addition of electrolytes. a. Name the above phenomenon B. What do you mean by gold number and coagulation value?

Explanation

a) Congulation
b) The anount of electrolyte required to precipitate 1 litre of a colloid is knówn as coagulation value of electrolyte. Gold number is the number of milligrams of the protective colloids re.quired fo prevent the coagulation of .10 ml. of standard gold sol on the additor of .1 ml.. of .10 %. NaCl solution into.it.