Name: ________________________________
___________________________
Date:
Purpose: (in one or two sentences, explain the objectives, aim, or purpose of the investigation. Be clear and precise.)
______________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________
_________________________________________________________________________________
_________
Method:
Part 1: Make three solutions of Kool-Aid with different concentrations and taste them to decide which concentration you prefer and why. You will need to prepare100 ml of each of the following Kool-Aid solutions: 0.029 mol/L, 90 g/L, and 0.935 mol/L.
Part 2: Make a 100ml solution of Kool-Aid using 45ml of the 0.935mol/L solution and determine its new molar concentration.
Materials:
Kool-Aid powder
Water
Stirring sticks
Triple beam balance
Cups
Spoons
Tasting glasses
Procedure:
Part 1:
1. Calculate the amount of Kool-Aid powder (in grams) that is needed to make each solution.
2. Mark the cup to the indicated line based on the demo cup provided by the teacher.
3. Mass the amount of Kool-Aid needed for the 0.029 mol/L molar concentrated solution, using the weighing boat and the spoon.
5. Place half the amount of the volume of the solvent (water) into the cup (50 ml).
6. Pour the solute into the cup. Do not use the flask as it may contain harmful chemicals.
7. Use the stirring stick and stir the solution until the Kool-Aid has dissolved.
8. Add the remaining volume of water into your cup.
9. Repeat steps 3 to 8 using a molar concentration of 90 g/L.
10. Repeat steps 3 to 8 using a molar concentration of 0.935 mol/L.
11. Sip the three different concentrated solutions of Kool-Aid and take note of the taste (make sure to share with your partner).
10. Fill in the observation table below. (make sure to describe the taste, color and smell)
11. Pour the rest of your solution down the sink or drink the rest.
Part 2: (Provide a detailed step by step protocol of what you did during this section of the lab. Write in the present tense as if you were instructing someone else to complete the lab.) ** Remember to number your steps **
_________________________________________________________________________________
_________________________________________________________________________________
MW – Solutions Lab: Concentration Pg.

Name: ________________________________
___________________________
Date:
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_____________________________________________
Results:
 Calculations:
Part 1:
Calculate how much solid Kool-Aid (in grams) you will need to make each solution:
(Show all the necessary formulas and include your units). Assume that the Kool-Aid powder is made of pure sugar with the following molecular formula, C
12
H
22
O
11
Round your answer to the nearest whole number! a) 0.029 mol/L solution: b) 90 g/L solution: c) 0.935 mol/L solution:
Part 2:
Show all the necessary calculations and include the formulas used. C
1
V
1
= C
V
C
V
2
1
1
=
=
C
2
=
=
2
V
2
C m or n
V
MW – Solutions Lab: Concentration Pg.

Name: ________________________________
___________________________
Date:
Mass of Kool-Aid in new solution: _____________
The new molar concentration of the diluted solution is: ________________________________________
 Tables:
Table 1: Solute and Solvent Needed
Solution Concentration
0.029 mol/L
90 g/L
0.935 mol/L
Volume of water needed (ml)
Table 2: Observations of Kool-Aid Solutions
Mass of solute needed (g)
Analysis Questions:
1. If you were working for the Kool-Aid company, which concentration would you recommend to customers?
Explain why.
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
___________________________
2. What happens to the color of your solution when you change your concentration? Explain what happens and why you think it happens.
MW – Solutions Lab: Concentration Pg.

Name: ________________________________
___________________________
Date:
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
___________________________
3. What was the final molar concentration of your diluted solution? ______________________________
In your opinion, is this new concentration of Kool-Aid solution better or worse than the original concentration (0.935 mol/L)?
________________________________________________________________
Would you market this concentration to the public as the recommended concentration? Justify your response.__________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
____________________________________________
Conclusion: (The conclusion should include one paragraph which briefly describes what happened in the experiment, what your data tells you about the experiment (restate your results) and what you learned from completing the experiment.)
_______________________________________________________________________________________________________________
_______________________________________________________________________________________________________________
_______________________________________________________________________________________________________________
_______________________________________________________________________________________________________________
_______________________________________________________________________________________________________________
_______________________________________________________________________________________________________________
MW – Solutions Lab: Concentration Pg.