1. Title: Soft-Drink Recipes Purpose: To gain experience with the concept of concentration Q? What is concentration? Date:

2. Concentration Investigation 3

3. Part 1- Changing the Solute Q? What happens to the concentration a solution when you increase the solute (the solid material)?

4. Soft Drink Recipes

5. What do you think? Is the soft drink a mixture? Yes, when you put 2 or more things together they are a mixture. Is the soft drink a solution? Yes, the solute (solid aka kool-aid) dissolved in the water so it is a solution How could we test this to determine if our soft-drink is a solution? You could use a filter.

6. Lets make some observations Lets have a sample of each soft-drink In table groups you will be called up to get sample 1 and 2. Please wait to taste until given directions to.

7. What do you think? Which soft-drink solution tasted sweeter?

8. Part- 2 Changing the amount of Solvent Q? What happens to the concentration of a solution when you decrease the amount of solvent in the solution?

9. Soft-Drink Solutions A and B

10. Which soft-drink would you recommend?

11. LOL WORD BANK: Concentration- is the amount of material dissolved in a measure of a liquid. To dilute is to make a solution less concentrated, usually by adding more liquid (solvent). Volume is the three-dimensional space occupied by something. In this investigation it is the amount of liquid.

12. LOL cont. Content: What happens to the soft-drink solution when you increase the amount of powder in a given amount of water? As the amount of solute (the kool-aid) in a solution is increased, the concentration goes up.

13. Concentration

14. Title: Salt Concentration Purpose: To investigate the concentration of Salt solutions. Date:

15. Q? Which salt solution is more concentrated?

16. How can we determine which salt solution is more concentrated?

17. Observations

18. Volume What happened to the volume of our saturated Kool-Aid solutions in the bottles? The volume increased What happened when we made solution 2 with three spoons of salt? The volume increased When you use a balance to compare concentrations of solutions, you must compare equal volumes.

20. Concentration If you compare equal volumes of two solutions on a balance, and one is heavier that the other, the heavier one is more concentrated

21. Part 3 & 4 Solution 2 Solution 3 had more water so it was diluted. Solution 3

22. LOL How can you determine relative concentrations of solutions? When equal volumes of two solutions are compared on a balance, the heavier one is more concentrated.