Solubility and Grams

Name

SOLUBILITY CURVES
Answer the following questions based on the solubility curve below.
Which salt is least soluble in water .. at 2O° C?
2. How many grams of potassium chloride can be dissolved in 200 g of water at 80° C?
IO
3. At 40° C, how much potassium

_ __nitrate coin be dissoiu$tl ^n 30D.g of water? ------W-

'1

80
70

...- O --60
0 5©

40

4. Which salt shows the least change

30

In solubility from 0° - 100° C?

20
10

At 30° C, 90 g of sodium nitrate Is

0
20 30 40 50 60 70 80 90 100

Temperature (0 °C)

dissolved in 100 g of water. Is this solution saturated , unsaturated or supersaturated? tat r
6. A saturated-solution-of-potassium chlorate is formed from one hundred grams of water. If the saturated solution is cooled from 80° C to 50° C, how many grams of precipitate are formed?

- -0 'I

4-V I

7. What compound shows a decrease in solubility from 0° to 100° C?
8. Which salt is most soluble at 10° C?
9. Which salt is least soluble at 50° C?
Which salt is least soluble at 90° C?
Chemistry IF8766

67

®instructlond Fair. Inc.

Date

Name
CHAPTER 16 REVIEW ACTIVITY

Class Text Reference : Section 16-9

Solubility Curves
Study the solubility curves in the figure , and then answer the questions that follow.
1. What relationship exists between solubility and temperature for most of the substances shown? 2. a. What is the exception?

NN t i

b. What general principle accounts for this ex6
6"
ception?
3. a. Approximately how many grams of NaNO3 will dissolve in 100 g of water at 20°C?
b. How many grams will dissolve at 60°C?

L How many grams of NHgC1 will dissolve in
= R.
1 dam'- of H2O at 50°C? o 5. Ninety grams of NaNO3 is added to 100 g of H2O at 0°C. With constant stirring, to what temperature
C must the solution be raised to produce a saturated

solution with no solid NaNO3 remaining?
6. A saturated solution of KC103 was made with
300 g of H2O