1. Solution Stoichiometry Topic 8.3

2. Expressing Concentration a solution can be described as concentrated or dilute. concentration is a ratio of the quantity of solute to the quantity of solution most calculations that involve solutions require quantitative of concentration. thus a solution with a concentration of 50 g per litre of solution is more dilute than a solution with 52 g of the same solute per litre of solution

3. Calculating Percent Concentrations There are three common methods for expressing percent concentration: mass/volume percent, or percent (m/v) mass percent, or percent (m/m) volume percent, or percent (v/v)

4. Mass/Volume Percent Expresses the mass of solute dissolved in a volume of solution as a percent: Percent(m/v) = mass of solute [in grams] X 100% mass of solution [in millilitres] Read pgs 371 -373 of text (MHR chemistry 11) and look at worked examples and practice problems

5. Mass Percent Expressed as a percent ratio of the mass of the solute to the mass of the solution: Percent(m/m) = mass of solute X 100% mass of solution Read pgs 374 -376 of text (MHR chemistry 11) and look at worked examples and practice problems

6. Very Small Concentrations Expressed in terms of parts per million or parts per billion: Both are fractions with the mass of solute divided by mass of the solution ppm = mass of solute ppb= mass of solute Read pgs 374 -376 of text (MHR chemistry 11) and look at worked examples and practice problems mass of solution X 10 6 mass of solution X 10 9

7. Solutions Concentration is expressed in terms of the mass or amount of solute dissolved in 1 dm 3 of solution g/dm 3 or mol/dm 3

10. Molarity is a term used to express concentration. The units of molarity are moles per liter (It is abbreviated as a capital M) = mol/dm 3 gram/dm 3 or g/dm 3

18. Practice Problems