Unit 8 Review
Solve all problems on a separate piece of paper. Show all work.
Molarity
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What is the concentration of a solution that contains 660 mol of calcium phosphate at 2.5 L?
How many moles of ammonium sulfate are needed to make a 0.25M solution at a concentration of 6M?
How many grams of potassium carbonate are needed to make 200 mL of a 2.5 M solution?
How many liters of a 4M solution can be made using 100 grams of lithium bromide?
How many liters of a 0.89 M solution can be made with 25.5 grams of lithium fluoride?
What is the concentration of a solution with a volume of 9 mL that contains 2 grams of iron (III) hydroxide?
How many liters of a 3.4 isopropanol solution can be made with 78 grams of isopropanol (C3H8O)?
Solubility
1. For the following, the amount of solute is given, and a temperature is stated. If
all the solute could be dissolved in 100 grams of water at the stated
temperature, would the resulting solution be unsaturated, saturated, or
supersaturated?
a. 60g KCl at 70°C
b. 90g KNO3 at 60°C
c. 110g NaNO3 at 45°C
d. 10g KClO3 at 10°C
e. 60g NH4Cl at 70°C
2. For the questions below, a solute and a temperature are given. Tell how many
grams of each solute must be added to 100 grams of water to form a
saturated solution (on the line) at that given temperature
a. NaNO3 at 30°C
b. KClO3 at 70°C
c. KNO3 at 45°C
d. KCl at 40°C
e. NaCl at 90°C
Acids and Bases
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A solution with a H+ concentration of 1.00 x 10-7 M is said to be neutral. Why?
Determine the pH of a .0034 M HNO3 solution
Determine the pOH of a .0034 M HNO3 solution
Determine the pH of a 4.3 X 10-4 M NaOH solution
HONORS ONLY: Titration Problems
1. Calculate the molarity of an acetic acid solution if 34.57 mL of this solution are needed to neutralize 25.19 mL of
0.1025 M sodium hydroxide.
2. If it takes 54 mL of .1 M NaOH to neutralize 125 mL of an HCl solution, what is the concentration of HCl?
3. If it takes 50 mL of .5 M KOH solution to completely neutralize 125 mL of sulfuric acid solution (H2SO4), what is the
concentration of the H2SO4 solution?