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Molarity and Dilutions

Authored by Lisa Thompson

Science

10th Grade

NGSS covered

Molarity and Dilutions
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15 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How many L are required to make 3.5 M hydrochloric acid using 1.1 moles? 

3.18 L

0.31 L

3.85 L

4.6 L

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If you have 0.045 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?

20.9 mol

0.021 mol

0.02 mol

0.0209 mol

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

2

3

4

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

0.625 g NaCl

625 g NaCl

36.5 g NaCl

0.04 mol NaCl

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When you make a dilution, which of these values remains constant?

The molarity (M)

The total moles of solute

The volume (V)

The concentration

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

As we dilute a solution.....

The volume increases and the molarity (M) increases

The volume increases and the molarity (M) decreases

The volume decreases and the molarity (M) increases

The volume decreases and the molarity (M) decreases

7.

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

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