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Worksheets

Molarity

Total questions: 10

Worksheet time: 30mins

Name
Class
Date
1.

How many dm3 would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide?

a)

2

b)

3

c)

4

d)

6

2.

What is the molarity of 4 g of NaCl (Na=23.0, Cl=35.5) in 3,800 cm3 of solution?

a)

0.018 M

b)

0.0011 M

c)

1.052 M

d)

0.062 M

3.

How many grams of solute are dissolved in 125.0 cm3 of 5.00 M NaCl (Na=23.0, Cl=35.5)?

a)

0.625 g NaCl

b)

625 g NaCl

c)

36.5 g NaCl

d)

0.04 mol NaCl

4.

How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 cm3?

a)

1074 mol

b)

0.069 mol

c)

1.07 mol

d)

62.7 mol

5.
True or False? The higher the concentration of a solution the less solutes it has in it.
a)
True
b)
False
6.

How many grams of AgNO3 (Ag=107.9, N=14.0, O=16.0) are needed to prepare 0.125M solution in 250 cm3 of water?

a)

.03g

b)

0.5g

c)

5.3g

d)

84.9g

7.

How many cm3 of 10.8M HCl are required to make 100.0 cm3 of 3.00M acid?

a)

27.8 cm3

b)

27.78 cm3

c)

2.8 cm3

d)

278 cm3

8.

Calculate the molarity of the following solution: 1.0 mole of KCl in 750.0 cm3 of solution.

a)

0.750 M

b)

99 M

c)

1.3 M

d)

2.0 M

9.

What is the molarity of a solution made by adding 1.565 moles of PbNO3 to 500 cm3?

a)

300. M

b)

31.3 M

c)

3.13 M

d)

1.56 M

10.

How many moles are needed to make 2.5 dm3 of a 3.8 M solution?

a)

9.5 mol

b)

0.66 mol

c)

1.5 mol

d)

15 mol