Molarity - Revsworld

1. A 1 M solution contains 20 grams of solute in 500
milliliters of solution. What is the mass of 1 mole of the
solute?
1) 10 g 3) 40 g
2) 20 g 4) 80 g
2. What is the molarity of an H 2 SO 4 solution if 0.25 liter of
the solution contains 0.75 mole of H 2 SO 4 ?
1) 0.33 M 3) 3.0 M
2) 0.75 M 4) 6.0 M
3. If 20. milliliters of a 1.0 M solution of HCl is exactly
neutralized by 40. milliliters of NaOH, the molarity of
the NaOH solution is
1) 1.0 M 3) 0.50 M
2) 2.0 M 4) 4.0 M
4. If 100. milliliters of a 1.0-molar NaCl solution is
evaporated to 25 milliliters, what will be the
concentration of the resulting NaCl solution?
1) 0.25 M 3) 0.50 M
2) 2.0 M 4) 4.0 M
5. What is the molarity of a solution that contains
40. grams of NaOH in 0.50 liter of solution?
1) 1.0 M 3) 0.50 M
2) 2.0 M 4) 0.25 M
6. The molarity (M) of a solution is equal to the
1)
2)
3)
4)
7. What is the molarity of a solution that contains 20. grams
of CaBr 2 in 0.50 liter of solution?
1) 0.50 M 3) 5.0 M
2) 0.20 M 4) 10. M
8. What is the molarity of a solution of NaOH if 2 liters of
the solution contains 4 moles of NaOH?
1) 0.5 M 3) 8 M
2) 2 M 4) 80 M
9. How many moles of solute would 3 liters of a 2-molar
solution contain?
1) 1 3) 3
2) 2 4) 6
10. How many milliliters of 12.0 M HCl(aq) must be diluted
with water to make exactly 500. mL of 3.00 M
hydrochloric acid?
1) 100. mL 3) 200. mL
2) 125. mL 4) 250. mL
11. What is the molarity of a solution that contains 0.50 mole
of NaOH in 0.50 liter of solution?
1) 1.0 M 3) 0.25 M
2) 2.0 M 4) 0.50 M
12. When 20. milliliters of 1.0 M HCl is diluted to a total
volume of 60. milliliters, the concentration of the
resulting solution is
1) 1.0 M 3) 0.33 M
2) 0.50 M 4) 0.25 M
13. When 0.50 liter of a 12 M solution is diluted to 1.0 liter,
the molarity of the new solution is
1) 6.0 M 3) 12 M
2) 2.4 M 4) 24 M
14. How many grams of ammonium chloride (gram formula
mass = 53.5 g) are contained in 0.500 L of a 2.00 M
solution?
1) 10.0 g 3) 53.5 g
2) 26.5 g 4) 107 g
15. What is the molarity of a solution that contains 0.25 mole
of solute in 250 milliliters of solution?
1) 1.0 M 3) 0.50 M
2) 0.025 M 4) 0.75 M
16. What is the molarity of a solution that contains 30. grams
of NaOH in 500. milliliters of solution?
1) 0.75 M 3) 1.5 M
2) 1.3 M 4) 2.6 M
17. How many liters of a 0.5 M sodium hydroxide solution
would contain 2 moles of solute?
1) 1 L 3) 3 L
2) 2 L 4) 4 L
18. How many moles of solute are contained in 200
milliliters of a 1 M solution?
1) 1 3) 0.8
2) 0.2 4) 200
19. What is the total number of moles of H 2 SO 4 needed to
prepare 5.0 liters of a 2.0 M solution of H 2 SO 4 ?
1) 2.5 3) 10.
2) 5.0 4) 20.
20. What is the molarity of a solution containing 20 grams of
NaOH in 500 milliliters of solution?
1) 1 M 3) 0.04 M
2) 2 M 4) 0.5 M
21. What is the total number of grams of NaOH (formula
mass = 40.) needed to make 1.0 liter of a 0.20 M
solution?
1) 20. g 3) 80. g
2) 2.0 g 4) 8.0 g
22. Which solution contains exactly 0.50 mole of H 2 SO 4 ?
1) 1.0 L of a 1.0 M solution
2) 2.0 L of a 1.0 M solution
3) 1.0 L of a 0.50 M solution
4) 2.0 L of a 0.50 M solution

23. What is the total number of moles of solute contained in
0.50 liter of 3.0 M HCl?
1) 1.0 3) 3.0
2) 1.5 4) 3.5
24. What is the molarity of a solution of KNO 3 (molecular
mass = 101) that contains 404 grams of KNO 3 in 2.00
liters of solution?
1) 1.00 3) 0.500
2) 2.00 4) 4.00
25. What is the total number of grams of HI in 0.500 liter of
1.00 M HI?
1) 1.00 g 3) 64.0 g
2) 0.500 g 4) 128 g
26. What is the concentration of a solution which contains 1
mole of CaCl 2 dissolved in 2,000 milliliters of solution?
1) 1 M 3) 0.5 M
2) 2 M 4) 0.25 M
27. If 0.50 liters of a 2.0M HCl is diluted with H 2 O to a
volume of 1.0 liters, the molarity of the new solution will
be
1) 1.0 M 3) .25 M
2) 2.0 M 4) .50 M
28. What is the total number of grams of NaOH (formula
mass = 40.) in 500. milliliters of a 1.0 M solution?
1) 10. 3) 40.
2) 20. 4) 80.
29. What is the molarity of a solution containing 20. grams
of NaOH in 0.50 liter of solution?
1) 1.0 3) 0.50
2) 2.0 4) 10.
30. What is the concentration of a solution of 10. moles of
copper (II) nitrate in 5.0 liters of solution?
1) 0.50 M 3) 5.0 M
2) 2.0 M 4) 10. M
31. What is the molarity of a solution that contains 4 grams
of NaOH in 500 milliliters of solution?
[Formula mass of NaOH = 40.]
1) 0.1 M 3) 0.2 M
2) 2 M 4) 0.5 M
32. What is the total number of moles of solute in 250
milliliters of a 1.0 M solution of NaCl?
1) 1.0 mole 3) 0.50 mole
2) 0.25 mole 4) 42 moles
33. A 20.-milliliter sample of 0.60 M HCl is diluted with
water to a volume of 40. milliliters. What is the new
concentration of the solution?
1) 0.15 M 3) 0.30 M
2) 0.60 M 4) 1.2 M
34. What is the total number of moles of solute in 2.0 liters
of 3.0 M NaOH?
1) 1.0 mole 3) 3.0 moles
2) 2.0 moles 4) 6.0 moles
35. Which preparation produces a 2.0 M solution of C 6 H 12 O 6
? [molecular mass = 180.0]
1) 90.0 g of C 6 H 12 O 6 dissolved in 500.0 mL of solution
2) 90.0 g of C 6 H 12 O 6 dissolved in 1000. mL of solution
3) 180.0 g of C 6 H 12 O 6 dissolved in 500.0 mL of solution
4) 180.0 g of C 6 H 12 O 6 dissolved in 1000. mL of solution
36. How many moles of KNO 3 are required to make 0.50
liter of a 2.0 M solution of KNO 3 ?
1) 1.0 3) 0.50
2) 2.0 4) 4.0
37. How many grams of KOH are needed to prepare 250.
milliliters of a 2.00 M solution of KOH
(formula mass = 56.0)?
1) 1.00 g 3) 28.0 g
2) 2.00 g 4) 112 g
38. What is the total number of grams of KCl (formula mass
= 74.6) in 1.00 liter of 0.200 molar solution?
1) 7.46 g 3) 22.4 g
2) 14.9 g 4) 29.8 g
39. What is the total number of grams of NaI(s) needed to
make 1.0 liter of a 0.010 M solution?
1) 0.015 3) 1.5
2) 0.15 4) 15

Answer Key
1. 3
2. 3
3. 3
4. 4
5. 2
6. 4
7. 2
8. 2
9. 4
10. 2
30. 2
31. 3
32. 2
33. 3
34. 4
35. 3
36. 1
37. 3
38. 2
39. 3
11. 1
12. 3
13. 1
14. 3
15. 1
16. 3
17. 4
18. 2
19. 3
20. 1
21. 4
22. 3
23. 2
24. 2
25. 3
26. 3
27. 1
28. 2
29. 1