MR. SURRETTE
VAN NUYS HIGH SCHOOL
CHAPTER 10: SOLUTIONS AND MOLARITY
WORKSHEET SOLUTIONS
1. Chemical solutions are __________ mixtures of solute and solvent.
1A. homogenous
2. Solid solutions consist of __________ dissolved in __________ .
2A. solids solids
3. Gas solutions consist of __________ dissolved in __________ .
3A. gases gases
4. Aqueous solutions consist of __________ dissolved in __________ .
4A. solutes water
5. Methanol dissolves best in __________ solutions.
5A. polar
6. More solute can dissolve in __________ solutions.
6A. unsaturated
7. Rock candy is a good example of a __________ solution.
7A. supersaturated
8. Seven grams of salt are added to a salt water solution and stirred thoroughly. No salt appears on the
bottom of the container. This solution is:
8A. unsaturated
9. __________ solutions have a high solute percentage.
9A. Concentrated
10. By definition, all solutions are:
10A. homogenous
11. Calculate the % mass of 14.7 grams sucrose dissolved in 412.1 mL water.
11A.
(1) 412.1 mL water = 412.1 g water
(2) mass of solvent = 412.1 g
(3) mass of solute = 14.7 g
(4) mass of solution = mass of solute + mass of solvent
(5) mass of solution = 14.7 g + 412.1 g
(6) mass of solution = 426.8 grams
(7) % mass = (mass solute / mass solution) x 100
(8) % mass = (14.7 g / 426.8 g) x 100
(9) % mass = 3.44%
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CHEMISTRY
MR. SURRETTE
VAN NUYS HIGH SCHOOL
12. Soda is 9.5% sucrose. What volume of soda in mL contains 72.7 g sucrose? (Assume the density
of soda = (WATER).
12A.
(1) 9.5 % sucrose = 9.5 g sucrose (convert percentages into grams)
(2) Volume = 72.7 g sucrose (100 mL soda / 9.5 g sucrose)
(3) Volume = 765.3 mL
13. Soda is 9.5% sucrose. How many grams of sucrose are found in 355 mL of soda?
13A.
(1) 9.5% sucrose = 9.5 g sucrose
(2) Mass = 355 mL (9.5 g sucrose / 100 mL)
(3) Mass = 33.7 g
14. What is the molarity of a solution that contains 5.5 grams NaCl dissolved in 1.2 liters water?
14A.
Convert grams NaCl to moles:
(1) NaCl = 5.5 g (1 mol NaCl / 58.44 g)
(2) NaCl = 9.41 x10-2 mol
Compute molarity of solution:
(3) M = (9.41 x10-2 mol NaCl / 1.2 L)
(4) M = 7.84 x 10-2
15. How many liters of 0.724 M NaOH solution contain 1.24 moles NaOH?
15A.
(1) Volume = 1.24 mol NaOH (1 liter / 0.724 mol)
(2) Volume = 1.71 L
16. How much 4.0 M NaNO3 is needed to make 0.585 L of 1.2 M NaNO3 solution?
16A.
Given: MI = 4.0 M, MF = 1.2 M, VF = 0.585 L
Find: VI
(1) MIVI = MF VF
(2) VI = MFVF/ MI
(3) VI = (1.2 M)(0.585 L) / (4.0 M)
(4) VI = 1.76 x 10-1 L
17. Solutes __________ by separating into ions or molecules.
17A. dissolve
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CHEMISTRY
MR. SURRETTE
VAN NUYS HIGH SCHOOL
CHAPTER 10: SOLUTIONS AND MOLARITY
QUIZ SOLUTIONS
1. More solute can dissolve in __________ solutions.
1A. unsaturated
2. Two grams of sugar are added to a sugar water solution and stirred thoroughly. Twenty grams of
sugar then form on the bottom of the container. This solution is:
2A. supersaturated
3. Cations and anions in liquid solutions are:
3A. electrolytes
4. By definition, all solutions are:
4A. homogenous
5. Ethyl alcohol dissolves best in __________ solutions.
5A. non-polar
6. Solutes __________ by separating into ions or molecules.
6A. dissolve
7. __________ solutions have a high solute percentage.
7A. Concentrated
8. __________ solutions have a low solute percentage.
8A. Dilute
9. The density of water is:
9A. 1.0 g/ mL
10.
(A)
(B)
(C)
(D)
(E)
Liquid solutions consist of __________ dissolved in liquids.
liquids
gases
solids
all of these
none of these
11. Calculate the % mass of 19.2 grams sucrose dissolved in 412.1 mL water.
11A.
(1) 412.1 mL water = 412.1 g water
(2) mass of solvent = 412.1 g
(3) mass of solute = 19.2 g
(4) mass of solution = mass of solute + mass of solvent
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CHEMISTRY
MR. SURRETTE
VAN NUYS HIGH SCHOOL
11A. (continued…)
(5) mass of solution = 19.2 g + 412.1 g
(6) mass of solution = 431.3 grams
(7) % mass = (mass solute / mass solution) x 100
(8) % mass = (19.2 g / 431.3 g) x 100
(9) % mass = 4.45%
12. Soda is 7.5% sucrose. What volume of soda in mL contains 185.2 g sucrose? (Assume the density
of soda = (WATER).
12A.
(1) 7.5 % sucrose = 7.5 g sucrose (convert percentages into grams)
(2) Volume = 185.2 g sucrose (100 mL soda / 7.5 g sucrose)
(3) Volume = 2469 mL
13. Soda is 7.5% sucrose. How many grams of sucrose are found in 355 mL of soda?
13A.
(1) 7.5% sucrose = 7.5 g sucrose
(2) Mass = 355 mL (7.5 g sucrose / 100 mL)
(3) Mass = 26.6 g
14. What is the molarity of a solution that contains 27.2 grams NaCl dissolved in 0.9
liters water?
14A.
Convert grams NaCl to moles:
(1) NaCl = 27.2 g (1 mol NaCl / 58.44 g)
(2) NaCl = 4.65 x10-1 mol
Compute molarity of solution:
(3) M = (4.65 x10-1 mol NaCl / 0.9 L)
(4) M = 5.17 x 10-1
15. How many liters of 0.154 M NaOH solution contain 1.24 moles NaOH?
15A.
(1) Volume = 1.24 mol NaOH (1 liter / 0.154 mol)
(2) Volume = 8.05 L
16. How much 5.0 M NaNO3 is needed to make 0.585 L of 1.2 M NaNO3 solution?
16A.
Given: MI = 5.0 M, MF = 1.2 M, VF = 0.585 L
Find: VI
(1) MIVI = MF VF
(2) VI = MFVF/ MI
(3) VI = (1.2 M)(0.585 L) / (5.0 M)
(4) VI = 1.40 x 10-1 L
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CHEMISTRY