Unit 1
Decision Making Related to Concentration of Mixtures and their Effects

Read the sentences about concentration of mixtures and write in the blanks
if they are true or false. Then, click on the button to check your answers.

1. The way to express the concentration of substances is by percentages.

2. The dissolutions have steady concentrations of salt.

3. The ratio of one part per million is abbreviated OPPM.

4. The ratio of one part per million is equal to one milligram of solute per liter of solution.

5. Virtually any material can cause harmful effects in the body, depending on its concentrations.