Which term describes a solution having a very well-known concentration of solute? Select one: Secondary standard Primary standard Standard solution Volumetric analysis

Standard solution

Explanation:

The correct answer would be a standard solution.

By definition, a standard solution is a solution whose concentration is known and which is often used to determine the concentration of other substances in, for example, titration. The process of using a solution of known concentration to determine the concentration of another substance is known as standardization.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)