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Oldatok 2

Oldatok 2

Assessment

Presentation

Chemistry

10th Grade

Hard

Created by

Balazs Barath

Used 1+ times

FREE Resource

0 Slides • 10 Questions

1

Multiple Choice

Which compound's solubility decreases most rapidly as the temperature changes from 10°C to 70°C

1

NH4Cl

2

NH3

3

HCl

4

KCl

2

Multiple Choice

A solution contains 14g of KCl in 100g of water at 40°C. What is the minimum amount of KCl that must be added to make this a saturated solution?

1

14g

2

19g

3

25g

4

44g

3

Multiple Choice

What happens when a crystal of a salt is dropped in an unsaturated solution of the same salt?

1

excess solute crystals form

2

the crystal dissolves

3

the crystal drops to the bottom, unchanged

4

the solution becomes colorless

4

Multiple Choice

What happens when a crystal of a salt is dropped in an supersaturated solution of the same salt?

1

excess solute crystals form

2

the crystal dissolves

3

the crystal drops to the bottom, unchanged

4

the solution becomes colorless

5

Multiple Choice

According to Reference Table G, which solution is saturated at 30°C?

1

12 grams of KC1O3 in 100 grams of water

2

12 grams of KC1O3 in 200 grams of water

3

30 grams of NaCl in 100 grams of water

4

30 grams of NaCl in 200 grams of water

6

Multiple Choice

An unsaturated solution is formed when 80 grams of a salt is dissolved in 100 grams of water at 40°C. This salt could be

1

KCl

2

KNO3

3

NaCl

4

NaNO3

7

Multiple Choice

Question image

A student prepares four aqueous solutions, each

with a different solute. Which solution is saturated?

1

1

2

2

3

3

4

4

8

Multiple Choice

A saturated solution of NaN03 is prepared at 60°C using 100 grams of water. As this solution is cooled to 10°C, NaN03 precipitates (settles) out of the solution. The resulting solution is saturated. Approximately how many grams of NaN03 settled out of the original solution?

1

46g

2

61g

3

85g

4

126g

9

Multiple Choice

Based on Reference Table G, what is the maximum number of grams of KCI(s) that will dissolve in 200 grams of water at 50°C to produce a saturated solution?

1

38g

2

42g

3

58g

4

84g

10

Multiple Choice

At STP, which of these substances is most soluble in H20?

1

NH3

2

KCl

3

HCl

4

NaNO3

Which compound's solubility decreases most rapidly as the temperature changes from 10°C to 70°C

1

NH4Cl

2

NH3

3

HCl

4

KCl

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MULTIPLE CHOICE