1. BELLRINGER Compare and explain in complete sentences what is a saturated solution.

2. Previous homework Finish and submit 4 BRs for the previous week.

3. SOLUTIONSIII Water and Solutions Concentration and Solubility

4. 4 9.2 Concentration and Solubility Suppose you dissolve 10.0 g of sugar in 90.0 g of water. What is the mass percent concentration of sugar in the solution? Asked:The mass percent concentration Given:10 g of solute (sugar) and 90 g of solvent (water) Relationships:

5. 5 9.2 Concentration and Solubility Suppose you dissolve 10.0 g of sugar in 90.0 g of water. What is the mass percent concentration of sugar in the solution? Asked:The mass percent concentration Given:10 g of solute (sugar) and 90 g of solvent (water) Relationships: Solve:

6. 6 9.2 Concentration and Solubility Concentration There are several ways to express concentration

7. 7 9.2 Concentration and Solubility Concentration Calculate the molarity of a salt solution made by adding 6.0 g of NaCl to 100 mL of distilled water.

8. 8 9.2 Concentration and Solubility Calculate the molarity of a salt solution made by adding 6.0 g of NaCl to 100 mL of distilled water. Concentration Asked:Molarity of solution Given:Volume of solution = 100.0 mL, mass of solute (NaCl) = 6.0 g Relationships:

9. 9 9.2 Concentration and Solubility Calculate the molarity of a salt solution made by adding 6.0 g of NaCl to 100 mL of distilled water. Concentration Asked:Molarity of solution Given:Volume of solution = 100.0 mL, mass of solute (NaCl) = 6.0 g Relationships: Solve:

10. 10 9.2 Concentration and Solubility Calculate the molarity of a salt solution made by adding 6.0 g of NaCl to 100 mL of distilled water. Concentration Asked:Molarity of solution Given:Volume of solution = 100.0 mL, mass of solute (NaCl) = 6.0 g Relationships: Solve: Answer:1.03 M solution of NaCl

11. 11 9.2 Concentration and Solubility sugar 100 mL H 2 O 10 g What happens when you add 10 g of sugar to 100 mL of water? Conc. (%) = 10 g/110 g Solubility

12. 12 9.2 Concentration and Solubility 100 mL H 2 O What happens when you add 10 g of sugar to 100 mL of water? Conc. (%) = 10 g/110 g Water molecules dissolve sugar molecules sugar 10 g Solubility

13. 13 9.2 Concentration and Solubility What happens when you add 10 g of sugar to 100 mL of water? But when two sugar molecules find each other, they will become “undissolved” (solid) again… Solubility

14. 14 9.2 Concentration and Solubility What happens when you add 10 g of sugar to 100 mL of water? But when two sugar molecules find each other, they will become “undissolved” (solid) again… … then, they become redissolved in water again. Solubility

15. 15 9.2 Concentration and Solubility What happens when you add 10 g of sugar to 100 mL of water? This is an aqueous equilibrium! Equilibrium Solubility

16. 16 9.2 Concentration and Solubility Solubility low high Concentration Equilibrium dissolving “undissolving” 10 g sugar 100 mL H 2 O Conc. (%) = 10 g/110 g 20 o C

17. 17 9.2 Concentration and Solubility Solubility low high Concentration Equilibrium dissolving “undissolving”

18. 18 9.2 Concentration and Solubility saturation: situation that occurs when the amount of dissolved solute in a solution gets high enough that the rate of “undissolving” matches the rate of dissolving. Equilibrium dissolving “undissolving”

19. 19 9.2 Concentration and Solubility saturation: situation that occurs when the amount of dissolved solute in a solution gets high enough that the rate of “undissolving” matches the rate of dissolving. 204 g sugar 100 mL H 2 O Conc. = 204 g/100 mL 20 o C Solubility

20. 20 9.2 Concentration and Solubility Solubility low high Concentration Equilibrium dissolving “undissolving” 250 g sugar 100 mL H 2 O Conc. = 250 g/100 mL 20 o C Undissolved sugar

21. 21 9.2 Concentration and Solubility 210 g sugar 100 mL H 2 O 20 o C Undissolved sugar Temperature and solubility 210 g sugar 100 mL H 2 O 30 o C All the sugar is dissolved

22. 22 9.2 Concentration and Solubility Temperature has an effect on solubility Temperature and solubility 210 g sugar 100 mL H 2 O 20 o C Undissolved sugar 210 g sugar 100 mL H 2 O 30 o C All the sugar is dissolved

23. 23 9.2 Concentration and Solubility ACTIVITY READ THE TEXTBOOK FROM PAGE 239. WORK PROBLEMS FROM PAGES 244 and 245.

24. 24 9.2 Concentration and Solubility Homework FINISH YOUR ACTIVITY ASSIGNMENT AND SUBMIT IT TOMORROW.