1. Mixtures and Solutions

2. Name the two parts of a solution

3. Solute (solid) and solvent (liquid)

4. In the salt layering lab, the yellow salt solution floated on top of the blue solution because the blue solution was ________ than the yellow solution.

5. more dense

6. 50 mL of solution A has more mass than 50 mL of solution B. True or False: Solution B has more solute than Solution A A B

7. False. When comparing solutions with equal volume, the solution with more mass has more solute. Therefore, we can conclude that solution A has more solute.

8. What do you do to make a solution more concentrated?

9. Add more solute (solid)

10. A student measures two salt and water solutions. 50 mL of solution A has more mass than 50 mL of solution B. True or False: Solution B weighs more than 50 grams. A B

11. True. Because 50 mL of water alone weighs 50 grams, the additional of salt would mean that the solution weighs more than 50 grams.

12. Solution A has more mass than solution B. Which solution is more concentrated? A B

13. Solution A. Given equal volumes, the more concentrated solution will have a greater mass.

14. The girl made 2 cups of Kool-Aid. Both had 20 grams of powder in them. Cup 1 had 100 mL of water and cup 2 200 mL of water. Which solution is the most concentrated? Why?

15. Cup 1 is more concentrated because there is a smaller amount of water (solvent) for the same amount of powder (solute).

16. In Mrs. Van Prooyen’s demonstration, the gram weight floated in solution 3 because the gram weight is (more, less) dense than the solution.

17. The gram weight is less dense than the salt water solution in cup three, therefore it floated.

18. A student weighs a beaker of 50 mL of water. How many grams does it weigh? A

19. Exactly 50 grams, because 1 mL of water weighs 1 gram.

20. The students compared 75 mL of solution A to 50 mL of solution B. They conclude that solution A is more concentrated. Is this correct? Why or why not? A B

21. In order to compare concentrations of solutions, we must compare equal volumes of the solutions.

22. What will happen when you combine two liquids of different densities?

23. They will form layers with the less dense liquid on top and the more dense liquid on the bottom.

24. The gram weight sunk to the bottom in solution 1 because the gram weight is (more, less) dense than the solution.

25. More. Materials or liquids with greater density than the solution they are in will sink.

26. The amount of solid dissolved in the solvent is its: a. evaporation b. solution c. concentration d. water cycle

27. Concentration. Ratio of solute to solvent- 50 g: 100 mL

28. True or false: All solid objects will sink in water.

29. False. Only if the object is more dense than the water.

30. The students were asked to compare solutions made by their teacher to discover concentration. Solution 1: 50 mL 3 tablespoons of salt Solution 2: 100 mL 8 tablespoons of salt Solution 3: 250 ML 15 tablespoons of salt Which is most concentrated? Least?

31. Solution 2 is most concentrated. Solutions 1 and 3 are equally concentrated. Solution 1- 3 Tbsp./50 mL Solution 2- 4 Tbsp./50 mL Solution 3- 3 Tbsp./50 mL

32. Which is the more concentrated solution? A B

33. Solution B

34. What do you do to dilute a concentrated solution?

35. Add more solvent (water)