1. Solutions
Section 3: Dilutions
Dilutions
Calculations
print 1-3,5-7

2. mol L mol L M = M = A. Dilutions Dilutions
lowers concentration, or molarity
but…
total moles of solute does not change
mol L
mol L
M =
M =

3. A. Dilutions
6 mol
in 100 mL
6 mol
in 200 mL
same
# of mol

4. A. Dilutions

5. A. Dilutions Dilutions initial Molarity Molarity of dilute solution
initial Volume
Molarity of dilute solution
Volume of dilute solution

6. 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
20.0 mL

7. 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)
4.00 M