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Practice: Molarity & Dilutions

Total questions: 12

Worksheet time: 2hrs 1mins

Name
Class
Date
1.

What is the molarity of 4.0 g of NaCl (MM=58.45) in 3,800 mL of solution?

a)

0.018 M

b)

0.0011 M

c)

1.052 M

d)

0.062 M

2.

How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (MM = 58.45)?

a)

0.625 g NaCl

b)

625 g NaCl

c)

36.5 g NaCl

d)

0.04 mol NaCl

3.
How many L are required to make 3.5 M hydrochloric acid using 1.1 moles? 
a)
3.18 L
b)
0.31 L
c)
3.85 L
d)
4.6 L
4.
What is the molarity of a solution made by adding 1.565 moles of PbNO3 to 500 mL?
a)
300. M
b)
31.3 M
c)
3.13 M
d)
1.56 M
5.

How many grams of AgNO3 are needed to prepare 0.125M solution in 250 mL of water? 

a)

.03g

b)

0.5g

c)

5.3g

d)

84.9g

6.

Which solution is more diluted?

Solution 1:

1000 mL of water

60g of salt


Solution 2:

500 mL of water

60 g of salt

a)

Not enough information to tell

b)

Solution 1

c)

Solution 2

d)

They are equally diluted

7.

Daniel is working in a chemistry lab and needs to prepare a dilute nitric acid solution for an experiment. How many liters of 0.110 M nitric acid can Daniel prepare by diluting 5.00 mL of 15.3 M stock solution?

a)

0.695 L

b)

359 L

c)

695 L

d)

0.0359 L

8.
What volume of 1.50 M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?
a)
150. mL
b)
151 mL
c)
1.00 L
d)
100. mL
9.
How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid?
a)
27.8 mL
b)
27.78 mL
c)
2.8 mL
d)
278 mL
10.

If 30.0 mL of a solution that has a 1.82 M is diluted to 1.14 M, what is the volume of my ending solution?

a)

.07mL

b)

19mL

c)

47.9mL

d)

63.8mL

11.

If you have 34 mL of a 0.5 M NaBr solution, what will the concentration be if 56 mL of water is added to it (HINT: add both volumes together for V2)?

a)

.189 M

b)

3.78 M

c)

.389 M

d)

1.76 M

12.

125.0 mL of 2.00 M calcium hydroxide solution is diluted to a concentration of 1.50 M. How many mL of water was added to the original volume?

a)

167 mL

b)

42.0 mL

c)

93.8 mL

d)

0.0240 mL