1. Wednesday May 6
Objective: Make solutions using a volumetric flask, and perform serial dilutions.
Checkpoint:
If you have 200 mL of a 0.10 M solution of HCl, how many moles of HCl are in the solution?
You want to make 500 mL of a 0.25 M solution of HCl. How many grams of HCl do you need?
Homework:
-none

2. 0.2 L M
If you have 200 mL of a 0.10 M solution of HCl, how many moles of HCl are in the solution?
mol x
0.10 M =
0.2 L
x = 0.10 M x 0.2 L =
0.02 mol

3. 0.5 L M
You want to make 500 mL of a 0.25 M solution of HCl. How many grams of HCl do you need?
mol  grams x
0.25 M =
0.5 L
x = 0.25 M x 0.5 L
36.46 g =
0.125 mol x =
4.56 g
1 mol

4. Solution
A homogenous mixture of two or more substances in a single phase.
Everything is mixed and has the same composition and properties throughout.

6. If you had a secret crush, what gift would you leave for them outside their door? In secret, because it’s a secret crush.

7. Why is molarity (concentration) important?

8. Make 50 mL of a 0.50 M solution of Kool-Aid
Solutions Lab: Part 1
Make 50 mL of a 0.50 M solution of Kool-Aid

9. Solutions Lab: Part 2 Partner 1:
Make 100 mL of a 0.15 M stock solution of NaCl
Partner 2:
Make 100 mL of a 0.05 M stock solution of NaCl
Dump solutions in bucket to conserve water. I will use it
for my dog to water my plants at home.

11. M1V1 = M2V2 Solutions Lab: Part 3 Dilutions equation
You have 100 mL of a 1.0 M solution of CuCl2. How much do you need to dilute to make 500 mL of a 0.1 M solution of CuCl2?

12. M1V1 = M2V2 Solutions Lab: Part 3 Dilutions equation
You have 1000 mL of a 5.0 M solution of CuCl2. How much do you need to dilute to make 100 mL of a 1 M solution of CuCl2?

13. Clean-up procedure Per lab station Per lab counter (on top of counter)
2 red volumetric flasks
1 weigh boat
Per lab counter (on top of counter)
2 rulers
2 wash bottles
1 kool-aid cup
1 NaCl cup