1. Concentration

2. Molarity
Moles of solute per liter of solution

3. Ex. 1
What is the molarity of a solution that was prepared by dissolving 11.5g of solid sodium hydroxide in 1.50L of water?

4. Ex. 2
Calculate the molarity of a solution prepared by dissolving 1.56g of gaseous HCl in enough water to make mL of solution.

5. Examples
Calculate the number of moles of chloride ions in 1.75L of M zinc chloride.
Typical blood serum is about 0.14M NaCl. What volume of blood contains 1.0mg of NaCl?
To analyze the alcohol content of a certain wine, a chemist needs 1.00 L of an aqueous 2.5 M potassium dichromate solution. How much solid must be weighed out to make this solution?

6. Dilution
When water is added to a concentrated solution in order to achieve the desired molarity
(molarity)(volume) = (molarity)(volume)

7. Ex.
What volume of 16M sulfuric acid must be used to prepare 1.5L of a .10 M solution?