Are these a colloid, suspension, or solution?

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.

To determine whether a substance is a colloid, suspension, or solution, we need to understand the characteristics of each.

1. Solution: A solution is a homogeneous mixture where one substance (solute) is dissolved uniformly in another substance (solvent) at the molecular level. Solutions are transparent, and the solute particles are too small to scatter light.

2. Colloid: A colloid is a heterogeneous mixture where small particles of one substance are evenly dispersed throughout another substance. Colloids typically appear cloudy or milky and exhibit the Tyndall effect, meaning they scatter light.

3. Suspension: A suspension is a heterogeneous mixture containing larger particles that settle out over time. Suspensions are not transparent, and the particles are large enough to be visible and settle under gravity.

Without specific substances provided, it's challenging to determine whether they form a colloid, suspension, or solution. More information about the substances and their properties, such as particle size, behavior in different solvents, and stability, is needed to make a classification.