1. Molarity
Calculate the concentration of a solute in terms of grams per liter, molarity, and percent composition.

2. Molarity Molarity is an unit of concentration in chemistry.
Concentration of a solution is a measure of the amount of solute that is dissolved in a given quantity of solvent.
A dilute solution is one that contains only a low concentration of solute.

3. Molarity
Molarity is the number of moles of a solute dissolved per liter of solution.
moles of solute
Molarity =
1 liter solution

4. Units of Molarity 1 L HCl solution 2.0 M HCl = 6.0 moles HCl

5. Calculating Molarity
If 4.0 g NaOH are used to make 500 mL of NaOH solution, what is the molarity (M) of the solution?

6. Calculating Molarity 1 mole NaOH 4.0 g NaOH x = 0.10 mol NaOH
500 mL x (1L /1000 mL) = .500 L
0.10 mol NaOH
0.500 L
0.20 mol NaOH / L
0.20 M NaOH

7. Sample Problem
A KOH solution with a volume of 400 mL contains 2 moles of KOH. What is the molarity of the solution?

8. Sample Problem
A glucose solution with a volume of 2.0 L contains 72 g glucose (C6H12O6). If glucose has a molar mass of 180 g/mole, what is the molarity of the glucose solution?

9. Molarity Conversion Factors
A solution is a 3.0 M NaOH.
Write the molarity in the form of conversion factors.
3.0 moles NaOH and 1L NaOH soln
1 L NaOH soln moles NaOH