At the end of this activity, students should be able to: û explain what colloids are û name the properties that distinguish colloids from other types of mixture (true solutions and suspensions) û list the types of colloid and give examples of them û explain what emulsifying agents are and what coagulation involves û explain how soap and detergents remove dirt û describe the behaviour of soap and detergents in hard water.

Originally released by Learnetic, 2016.