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Metric Conversions and Dilutions Review

Total questions: 24

Worksheet time: 12mins

Name
Class
Date
1.

What does C1 stand for?

a)

Initial Volume

b)

Initial Concentration

c)

Final Volume

d)

Final Concentration

2.

What does V1 stand for?

a)

Initial Volume

b)

Initial Concentration

c)

Final Volume

d)

Final Concentration

3.

What does C2 stand for?

a)

Initial Volume

b)

Initial Concentration

c)

Final Volume

d)

Final Concentration

4.

What does V2 stand for?

a)

Final Volume

b)

Final Concentration

c)

Initial Volume

d)

Initial Concentration

5.

Which of the following is NOT a unit of volume?

a)

meter

b)

liter

c)

milliliter

d)

microliter

6.

Which of the following is a unit of concentration (choose all that apply)?

a)

dg/l

b)

%

c)

X

d)

ppm

7.

What does ppm stand for?

a)

parts per milliliter

b)

parts per million

c)

parts per millisecond

d)

parts per mitlitski

8.

Which unit is largest unit of measure?

a)

liter

b)

deciliter

c)

centiliter

d)

kiloliter

9.

Which is the smallest unit of measure?

a)

kilogram

b)

microgram

c)

picogram

d)

gram

10.

What is C1 in the following problem:

You have a 10X Buffer solution. You want to make a 5L solution of 2X Buffer. How much 10X Buffer do you need to use?

a)

10X

b)

5L

c)

2X

d)

10L

11.

What is C2 in this problem:

You have a 10X Buffer solution. You want to make a 6L solution of 3X Buffer. How much 10X Buffer do you need to use?

a)

10X

b)

6L

c)

3X

d)

10L

12.

What is V1 in this problem:

You have 5L of a 10X Buffer solution. How much 4X Buffer can you make?

a)

5L

b)

10X

c)

4X

d)

4L

13.

What is V2 in this problem:

You have a 10X Buffer solution. You want to make a 9L solution of 6X Buffer. How much 10X Buffer do you need to use?

a)

10X

b)

9L

c)

6X

d)

10L

14.

You have a 10X Buffer solution. You want to make a 10L solution of 7X Buffer. How much 10X Buffer do you need to use?

a)

10L

b)

7ml

c)

10ml

d)

7L

15.

In the following problem, how much water would you need to add to create your final solution?

You have a 10X Buffer solution. You want to make a 10L solution of 7X Buffer. How much 10X Buffer do you need to use?

a)

7L

b)

3X

c)

3ml

d)

3L

16.

What number goes on the arrow in this serial dilution (how much is transferred between tubes)?

3-step 10% serial dilution (dilute by 1/10 at each step) starting with a 50 mg/ml stock solution and using a total volume of 10 ml at each step.

a)

1L

b)

10ml

c)

5ml

d)

1ml

17.

How much water should be in each tube?

 3-step 25% serial dilution (dilute by 1/4 at each step) starting with a 50 mg/ml stock solution and using a total volume of 5 ml at each step

a)

1.25 ml

b)

3.75 ml

c)

5 ml

d)

2.5 ml

18.

What will the concentration of the 1st dilution be ?

3-step 50% serial dilution (dilute by ½ at each step) starting with a 50 mg/ml stock solution and using a total volume of 10 ml at each step

a)

0.25 mg/ml

b)

25 mg/ml

c)

5 mg/ml

d)

0.5 mg/ml

19.

5L = ? kL

a)

5000 kL

b)

50 kL

c)

0.05 kL

d)

0.005 kL

20.

1 g = ? cg

a)

0.1 cg

b)

0.01 cg

c)

10 cg

d)

100 cg

21.

5.4 ul (microliters) = ? kl

a)

5400000000 kl

b)

0.000000054 kl

c)

0.0000000054 kl

d)

0.00000054 kl

22.

67 mm = ? cm

a)

670 cm

b)

6.7 cm

c)

0.67 cm

d)

67.0 cm

23.

What is the correct definition of dilution?

a)

adding a solute to a solution to reduce the concentration of solvent

b)

adding a solvent to a solution to increase the concentration of the solute

c)

adding a solvent to a solution to reduce the concentration of the solute

24.

Which of the following is NOT a metric unit?

a)

mile

b)

milliliter

c)

kilogram

d)

meter