1. Solution Chemistry

2. Solutions  Uniform mixtures, composition is the same throughout  Solvent— substance doing the dissolving, present in a larger amount.  Solute— dissolved substance, present in a smaller amount, most of the time goes through phase change.  Colloid— mixtures of particles existing between a suspension and a solution  Suspension— mixture with larger particles settling to the bottom unless stirred.

3. Solution Examples  Sugar in Tea  Salt water

4. Which of the following are solutions? A) Chicken noodle soup B) Air C) Wine D) Table salt

5. Concentration  Amount of solute amount of solvent or solution  How much “stuff” is in a solution Ex. Orange juice, sweet tea Can you think of others?

6. Molarity (M)  Main unit of concentration in chemistry  Moles solute L solution First step—convert given values into moles and liters!! Get everything in the correct units!!

7. Example 1: What is the concentration/molarity of a 50.0 ml solution with 1.25g of CuSO 4 in water?

8. Example 2: Find the number of moles needed to make 250 ml of a 0.150 M solution of Na 2 SO 4.

9. Example 3: A 500 ml solution of NaOH has a molarity of 0.50M. How many moles of NaOH are in the solution?

10. Example 4: You have two solutions. One solution has 500 ml of 0.20 M NaCl and the other solution has 250 ml of 0.25 M NaCl. Which solution is more concentrated?

11. Homework  Complete Molarity Practice worksheet--- Wednesday