1. Percent by Mass Describes solutions in which a solid is dissolved in liquid Percent by Mass = mass of solute/mass of solution x 100 Mass of solution is the sum of solute and solvent

2. In order to maintain a sodium chloride concentration similar to ocean water, an aquarium must contain 3.6 g NaCl per 100.0 g of water. What is the percent by mass of NaCl in solution? 3.6/103.6 x 100 3.5 %

3. You have 1500.0 g of a bleach solution. The percent by mass of the solute NaOCl is 3.62 %. How many grams of NaOCl are present?

4. Percent by Volume Both solute and solvent are liquids Percent by Volume = volume of solute/volume of solution x 100 Volume of solution is the sum of solute and solvent

5. Rubbing alcohol is 70% isopropyl alcohol. If you have 100 mL of rubbing alcohol, how many mL is the alcohol?

6. Mole Fraction Ratio of # of moles of solution in solution to total # of moles solute and solvent X A = mole fraction for solvent X A = n A / (n A + n B ) X B = mole fraction for solvent X A = n B / (n A + n B )

7. A solution is 37.5% HCl and 62.5% water. Determine the mole fraction each compound.