Acid - base reactions 1

CHEMISTRY  SSS2  First Term

WEEK 7

Acid - base reactions 1

Performance objectives

Students should be able to:

1. Define a standard solution.
2. Define mass concentration and molar concentration
3. Explain the relationship between concentration and volume of reacting substances

Content

Standard solution

A standard solution is any chemical solution which has a precisely known concentration. Similarly, a solution of known concentration has been standardized. To prepare a standard solution, a known mass of solute is dissolved and the solution is diluted to a precise volume.

Standard solution concentration is usually expressed in terms of molarity (M) or moles per liter (mol/L). Not all substances are suitable solutes for standard solutions. The reagent must be stable, pure, and preferably of high molecular weight.

Mass concentration…