Solutions Review
1. Determine the concentration of a 250 mL solution containing 0.14 moles of
solute.
2. Determine the concentration of a 3.5 L solution containing 80.0 g of NaOH,
molar mass = 39.997 g/mol.
3. How many moles of solute are in a 1.25 L solution that is 0.15 M.
4. A 8.0 M solution containing 1.85 moles of solute will occupy what volume?
5. Find the volume, in mL, of a 3.5 M solution containing 0.045 moles of solute.
6. List two ways to make a saturated solution unsaturated.
7. Determine the concentration of a 575 mL solution that was made by diluting
100.0 mL of 5.0 M solution.
8. To what volume, in mL, must a 12.0 M, 0.500 L solution be diluted to in order
to create a 2.5 M solution?
9. Find the solubility of the following compounds at 80°C.
a. KCl
b. NH4Cl
c. KClO3
10. Find the min temp to dissolve100 g of NaNO3
11. How much more KCl can be dissolved at 80°C than at 30°C?
12. If 120 g of KClO3 is added to 100 g of water at 70°C, how much will not
dissolve?
13. A 750 mL, 3.0 M must be diluted with what volume of solvent to create a 2.25
M solution?
14. A saturated solution of KNO3 initially at 30°C is heated to 65°C, how much
more KNO3 can be dissolved.
15. Determine if the following solutions are saturated or unsaturated
a. A solution containing 100 g of water and 50 g of NH4Cl at 50°C
b. 30 g of NaNO3 in 100 g of water at 45°C
c. 50 g of NaCl in 100 g of water at 80°C
Solutions Review
1. Determine the concentration of a 250 mL solution containing 0.14 moles of
solute.
0.14 / 0.250 = 0.56 M
2. Determine the concentration of a 3.5 L solution containing 80.0 g of NaOH,
molar mass = 39.997 g/mol.
80.0 / 39.997 = 2.00 moles
2.00 / 3.5 = 0.57 M
3. How many moles of solute are in a 1.25 L solution that is 0.15 M.
0.15 = n / 1.25
n = 0.19 moles
4. A 8.0 M solution containing 1.85 moles of solute will occupy what volume?
8.0 = 1.85 / V
V = 0.23 L or 230 mL
5. Find the volume, in mL, of a 3.5 M solution containing 0.045 moles of solute.
3.5 = 0.045 / V
V = 0.013 L = 13 mL
6. List two ways to make a saturated solution unsaturated.
Heat it up or add more solvent
7. Determine the concentration of a 575 mL solution that was made by diluting
100.0 mL of 5.0 M solution.
M1 (575) = (5.0) (100)
M1 = 0.87 M
8. To what volume, in mL, must a 12.0 M, 0.500 L solution be diluted to in order
to create a 2.5 M solution?
(12.0) (500) = (2.5) V2
V2 = 2,400 mL
9. Find the solubility of the following compounds at 80°C.
a. KCl
50 g
b. NH4Cl
65 g
c. KClO3
40 g
10. Find the min temp to dissolve100 g of NaNO3
35 °C
11. How much more KCl can be dissolved at 80°C than at 30°C? (50 – 35) = 15 g
12. If 120 g of KClO3 is added to 100 g of water at 70°C, how much will not
dissolve?
(120 – 33) = 87 g
13. A 750 mL, 3.0 M must be diluted with what volume of solvent to create a 2.25
M solution?
(3.0) (750) = (2.25) V2
V2 = 1000 mL
1000 – 750 = 250
Solution must be diluted with 250 mL of solvent
14. A saturated solution of KNO3 initially at 30°C is heated to 65°C, how much
more KNO3 can be dissolved.
(115 – 45) = 70 g
15. Determine if the following solutions are saturated or unsaturated
a. A solution containing 100 g of water and 50 g of NH4Cl at 50°C Sat
b. 30 g of NaNO3 in 100 g of water at 45°C Unsaturated
c. 50 g of NaCl in 100 g of water at 80°C
Saturated