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HC Ch 15 Test

Authored by Robert Oliver

Chemistry

9th - 12th Grade

NGSS covered

HC Ch 15 Test
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40 questions

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1.

DRAG AND DROP QUESTION

1 min • 1 pt

Approximately 38 g of NaCl can be dissolved in 100 g of water at 25 °C.

A solution prepared by adding 35 g of NaCl to 100 g of water at 25 °C is unsaturated.

(a)  

True

False

2.

DRAG AND DROP QUESTION

1 min • 1 pt

To prepare 20.0 mL of a 2.00 M solution of hydrochloric acid from a 10.0 M stock solution, you should take 4.00 mL of the stock solution and add 20.0 mL of water.

(a)  

True

False

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The total mass of a solution is 153.4 g. The solvent mass is 125.2 g. What is the mass percent of the solute?

122.5%

not enough information given

18.38%

81.62%

22.52%

4.

DRAG AND DROP QUESTION

1 min • 1 pt

An oven-cleaning solution is 40.0% (by mass) NaOH. If one jar of this product contains 454 g of solution, how much NaOH does it contain?

(a)  

1.14 × 10³ g

114 g

182 g

None of these

18.2 g

5.

DRAG AND DROP QUESTION

1 min • 1 pt

A solution is prepared by dissolving 7.31 g of Na₂SO₄ in enough water to make 225 mL of solution. Calculate the solution molarity.

(a)  

1.64 M

3.11 M

0.136 M

0.229 M

30.8 M

6.

DRAG AND DROP QUESTION

1 min • 1 pt

What mass of solute is contained in 25.4 mL of a 1.56 M potassium bromide solution?

(a)  

3.02 g

4.72 g

186 g

119 g

None of these

7.

DRAG AND DROP QUESTION

1 min • 1 pt

What volume of a 10.0 M HNO₃ solution is needed to completely neutralize 575 mL of a 4.10 M KOH solution?

(a)  

0.0236 mL

236 mL

2.36 mL

0.236 mL
None of these

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