Prepare for the American Water Works Water Treatment Plant Operator Test. Study with multiple choice questions, each with hints and explanations. Get ready to excel!

Multiple Choice

A homogeneous mixture of two or more substances is called what?

Uniform distribution is what makes a solution different from other mixtures. When two or more substances mix so completely that you can’t see separate parts and the dissolved substance is spread evenly throughout the other, you have a solution. In water treatment terms, dissolving salt or sugar in water creates a solution because the salt or sugar (the solute) is dispersed uniformly in the water (the solvent) and everything forms a single, uniform phase. This helps distinguish from a compound, which is a substance formed by chemical bonds between elements in fixed proportions, not just physically mixed. An element is a pure substance made of one kind of atom. A mixture, on the other hand, can be either uniform or nonuniform; a uniform one is described as a solution.

Uniform distribution is what makes a solution different from other mixtures. When two or more substances mix so completely that you can’t see separate parts and the dissolved substance is spread evenly throughout the other, you have a solution. In water treatment terms, dissolving salt or sugar in water creates a solution because the salt or sugar (the solute) is dispersed uniformly in the water (the solvent) and everything forms a single, uniform phase.

This helps distinguish from a compound, which is a substance formed by chemical bonds between elements in fixed proportions, not just physically mixed. An element is a pure substance made of one kind of atom. A mixture, on the other hand, can be either uniform or nonuniform; a uniform one is described as a solution.