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Dilution and Molarity Calculations

Total questions: 10

Worksheet time: 22mins

Name
Class
Date
1.

1 - The higher the molarity, the ________ the solution

a)

more concentrate

b)

less concentrated

2.

2 - True or False?

The higher the concentration of a solution the less solutes it has in it.

a)
True
b)
False
3.

3 - Convert 25 mL to liters (L)

a)

0.025

b)

0.25

c)

2.5

d)

d) 0.0025

4.

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

***Change the mL to L before calculating

a)
300. M
b)
31.3 M
c)
3.13 M
d)
1.56 M
5.

5 - Calculate the molarity of the following solution:  1.0 mole of KCl in 750.0 mL of solution.

***Change the mL to L before calculating

a)
0.750 M
b)
99 M
c)
1.3 M
d)
2.0 M
6.

6 - Which of the following is the Dilution Formula?

a)

V1M1 = V2M2

b)

M = m/V

c)

V = mT

d)

PV = nRT

7.

7 - A dilution is when

a)

solute is added to the volume of solution

b)

water is added to the volume of solution

c)

solute is removed from the volume of solution

d)

water is removed from the volume of solution

8.

8 - If 2.5 L of a 4M solution of FeCl3 is diluted to a volume of 6 L by the addition of water, what is the molarity of the diluted solution?

a)

2.5 M

b)

4.17 M

c)

6.25 M

d)

1.67 M

9.
  1. 9-   If a chemist starts with 25 mL  of 6M HCl and prepares a new solution with a concentration of 0.5M, what with be the new volume?

a)

200 mL

b)

500 mL

c)

300 mL

d)

400 mL

10.

10 - A chemist dilutes 25 mL of a 2M solution to make 500 mL of new solution.  What is the molar concentration of the new solution?10

a)

0.1 M

b)

0.2 M

c)

0.5 M

d)

1.0 M