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Concentration and Molarity

Authored by Lisa Thompson

Science

10th Grade

NGSS covered

Concentration and Molarity
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25 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How many mL of stock solution of 2M NaCl do you need to prepare 100 mL of 0.150M NaCl?

7.5 mL

15 mL

1333 mL

200 mL

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What would the molarity of a solution be if you took 10 mL of a 13M stock solution and made a 300 mL solution?

390M

230M

0.43M

0.26M

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?

0.067 mL

60.0 mL

100 mL

125 mL

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250.0 mL?

15.9 M

0.636 M

0.642 M

1.59 M

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

27.8 mL

27.78 mL

2.8 mL

278 mL

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What volume of 1.50 M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?

150. mL

151 mL

1.00 L

100. mL

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If I have 340.0 mL of a 0.500 M NaBr solution, what will the concentration be if I add 560.0 mL more water to it? (Remember to use the total new volume)

.188 M

3.78 M

.389 M

1.76 M

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