Lesson 5

Using a chart like the one provided in Try This 4 is one strategy for setting up a rational equation to solve a problem. Charts are helpful for identifying patterns and organizing information. You probably also found the interactives Bleach Solution and Flyer Scramble useful.

Self-Check 3

The concentration, C, of salt in a solution is determined by the formula where A is the constant amount of salt, s is the initial amount of solution, and w is the amount of water added.

1. How much water must be added to a 1-L bottle of 30% salt solution to get a 10% solution? Answer
2. How much water must be added to a 0.5-L bottle of 10% salt solution to get a 2% solution? Answer