1. Solution Concentrations The measured amount of solute in a given amount of solvent or solution.

2. Percent by mass % by mass = mass solute x100 total mass solution O Calculate the % by mass of water in solution made up of 123 g NaOH and 289 g water.

3. ppm & ppb O Parts per million or parts per billion O % by mass x 10 4 % by mass x 10 7 O US and Canada drinking water cannot contain 5 x 10 -4 mg Hg per gram. What is the ppm?

4. Molarity O Most common concentration used O Molarity: (M) = # mole solute # L of solution O What is the concentration of 3.4 mol NaCl in 1200mL of solution? O How many moles of CaCl 2 do you need in 356 mL of solution to make a 0.125M solution?

5. molality O molality: (m) = # moles solute kilograms solvent O Calculate the molality of B 6 at 0.317 mol in 500 g of water.

6. Dilutions O Dilution equation: M 1 V 1 = M 2 V 2 O How would you prepare 100.0 mL of 0.200M solution NaOH from a bottle labeled 0.4871 M?