SCH3U1: MIXTURE OF SOLUTION QUESTIONS
1. A chemist mixes aqueous potassium iodide with lead(II) acetate to produce a bright yellow precipitate for her
chemistry magic show. Write the net ionic equation for this reaction.
2. D5W is an intravenous solution used as a fluid and nutrient replenisher for patients. As a hospital pharmacist you
need to make 750 mL of this solution with a concentration of 0.30 mol/L. What mass of glucose, C6H12O6, will
you need to dissolve in water?
3. Saline solutions are used in hospitals to replace lost body fluids and electrolyes. A normal saline solution is made
by dissolving 0.9 g of NaCl in 100 mL of water. Calculate its concentration as % by mass.
4. Concentrated hydrogen peroxide in high school labs is 30% M/V H2O2 dissolved in water. Calculate the mass of
pure H2O2 dissolved in a 450-mL bottle?
5. A "sports drink" contains 50 mg of sodium ions and 55 mg of potassium ions per 400 mL serving. Calculate the
concentration of the sodium and potassium ions in ppm.
6. What volume of a 17.4 mol/L acetic acid stock solution is required to make 2.0 L of a 1.5 mol/L acetic acid
solution?
7. The concentration of an HCl acid solution is initially 6.0 mol/L. What would the concentration of a new solution
be if 200 mL of the original HCl solution is diluted to 1.0 L with water?
8. How much water must be added to 600 mL of a 1.5 mol/L CaCl2 solution to make the concentration of the
resulting solution 1.0 mol/L?
9. Standard solutions of sodium oxalate, Na2C2O4(aq), are required for certain types of chemical analyses. If 8.5 g of
sodium oxalate is dissolved in 500 mL of distilled water, calculate the concentration of the sodium ion and the
concentration of the oxalate ion dissolved in this solution.
10. One brand of mineral water contains 1.55 ppm of dissolved nitrate. Calculate the mass of nitrate in an 11.0-L
container of this bottled water.
11. Students in a chemistry lab are making the compound cobalt(II) carbonate. It can be made by reacting sodium
carbonate solution with cobalt(II) chloride solution. Calculate the volume of 1.0 mol/L cobalt(II) chloride
solution required to completely react with 250 mL of 1.5 mol/L sodium carbonate.
12. A student mixed 100.0 mL of a 0.100 mol/L solution of barium chloride with 100.0 mL of a 0.100 mol/L solution
of iron(III) sulphate. The barium sulphate precipitate was filtered, dried, and was measured to have a mass of 2.0
g. Calculate the % yield of the barium sulphate.
13. A teaspoon of milk of magnesia contains 12.0 mg of magnesium hydroxide. What volume of 0.01 mol/L HCl in
a person's stomach would be neutralized by this teaspoon of antacid?
Acids & Bases Review Questions
1.
Name or provide the formula for the following acids
a)
b)
c)
d)
e)
HNO3
H2CO3
HI
H3PO4
HClO
f)
g)
h)
i)
j)
HF
Chloric acid
Hydrochloric acid
chlorous acid
Sulphuric acid
2.
Calculate the pH for the following solutions
a)
b)
c)
d)
e)
f)
g)
h)
i)
A solution that is 1000 times more basic than a solution with a pH of 8
A solution that is 10000 times less acidic than a solution that has [H+]=0.1 mol/L
[H+]=0.050 mol/L
[H2SO4]=0.1 mol/L (assuming both hydrogen ions fully detach)
A solution created by dissolving 0.50 g of potassium hydroxide in 75 ml of water
A solution created by dissolving 0.24 g of calcium hydroxide in 100.0 ml of water
A solution that has been diluted by adding 200.0 ml of water to 150.0 ml of a solution with a pH of 4.2.
[HA]=3.0 mol/L where HA is a weak acid that has a percent dissociation of 2%.
A solution that results from the combination of equal volumes of 0.10 mol/L hydrochloric acid and 0.15
mol/L sodium hydroxide.
3.
A solution of nitrous acid has 2.35 g dissolved in 500 ml. The pH of the solution is measured to be 2.2. To
what percentage does nitrous acid dissociate in water?