1. In a Spa

2. Molarity
 Molarity is the number of moles of
solute per liter of solution
 molarity = moles of solute
liters of solution

3. Example
 When people get pedicures, bath
salts are dissolved in the water.
 If 40 grams of Epsom salts, MgSO4, is
dissolved in 8 liters of water, what is
the molarity?

4. Answer
 40 g MgSO4 = 0.166 moles
 0.332 moles/ 8 liters = 0.042 M
 Molarity = 0.042