1. Unit 13: Solutions & Equilibrium
Dilutions
Dilutions
Calculations
print 1-3,5-7

2. A. Dilutions M = mol L Dilution same total mol solute
lowers conc. (molarity)
mol L
mol L
M =
M =
6 mol
in 100 mL
6 mol
in 200 mL
same total
mol solute

3. A. Dilutions Dilution initial Molarity Molarity of dilute solution
initial Volume
Molarity of dilute solution
Volume of dilute solution

4. B. Calculations V1 = (0.400 M) x (100 mL) (2.00 M) (2.00 M) x V1 =
Finding Volume (V1)
How many mL of 2.00 M MgSO4 must be diluted to prepare 100 mL of M MgSO4?
V1 = (0.400 M) x (100 mL)
(2.00 M) V1 M1 V2 M2
(2.00 M) x V1 =
(0.400 M) x (100 mL)
bleach
V1 = 20.0 mL

5. B. Calculations M2 = (10.0 M) x (200 mL) (500 mL)
Finding Molarity (M2)
200 mL of 10.0 M NaOH is diluted to 500 mL, what is the molarity of the dilute solution?
M2 = (10.0 M) x (200 mL)
(500 mL) V1 M1 V2 M2
(10.0 M) x (200 mL) =
M2 x (500 mL)
M2 = 4.00 M