Question

Are these a colloid, suspension, or solution?

a) milk in water
b) chalk powder in water
c) copper sulfate in water

Answer 1

a = colloid, B = suspension C = solution

Explanation:

A is milk in water, actually is does not have to be in water since milk already is a mixture of fats and water. Since milk is one hole solution and not in two layers is because of an emulsion. A colloid is just a mixture where a substance of dispersed insoluble particles is suspended throughout another substance.

Chalk powder is very little soluble in water therefore this will form an suspension. A suspension is a solution of a liquid and a solid, where the solid just floats around in the liquid without dissolving in the solution.

Copper sulfate is very soluble in water, thereby making it a solution. A solution is a homogeneous mixture of two or more compounds.