1. Water C 1 Flashcards pp. 45-53

2. Use the graph on pg. 46 to answer some of these questions.

3. Give an example of a solute and a solvent.

4. Solvent: water Solute: kool-aid (or sugar) OR Solvent: laundry detergent Solute: grease stain

5. If you have 60g KNO 3 at 40 o C in 100g of water, is the solution… saturated, unsaturated or supersaturated?

6. Saturated

7. If you have 80g of KNO 3 at 10 o C, 100g of water, is the solution… saturated, unsaturated or supersaturated?

8. Supersaturated

9. If you have 70g of KNO 3 at 80 o C, in 100g of water, is the solution… saturated, unsaturated or supersaturated?

10. Unsaturated

11. What is the minimum amount of water needed to dissolve 70g KNO 3 at 80 o C?

12. At 80 o C 160g KNO 3 = 70g KNO 3 100g H 2 O Xg x = 43.8g

13. What mass of KNO 3 will dissolve in 100g of water at 10 o C?

14. About 20 g KNO 3

15. How much KNO 3 will dissolve in 250g of H 2 O at 50 o C?

16. At 50 o C 80g = X 100g 250g x = 200g KNO 3

17. If you have 50g KNO 3 at 50 o C, in 100g H 2 O how much more KNO 3 must be added to saturate the solution?

18. 80g is saturated so subtract 50g and 30g more of KNO 3 must be added.

19. An alka-seltzer tablet is placed in water and then the medicine is consumed. Identify the 3 underlined substances as solute, solution and solvent.

20. Solute - Alka-seltzer tablet Solvent - water Solution - medicine

21. What is the percent concentration of a solution that contains 45g of weed killer in 1500g of water?

22. 45 x 100 (45g + 1500g) =2.9%