Concentration

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 26.8 mL of solution.

5
Examples

• Calculate the number of moles of chloride ions in
  1.75L of .0010 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 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?