Problems
The solubility of a solute in a solvent generally, but not always, increases as temperature increases. You can set up a graph to show solubility by plotting the temperature horizontally and the gram mass of the solute vertically. Use the data below to find the solubility curve for each substance.
sodium nitrate
|
temperature
|
solubility
|
|
(degrees Celsius)
|
(grams/100 cc. water)
|
|
25
|
90
|
|
50
|
102
|
|
75
|
125
|
|
100
|
170
|
sodium chloride
|
temperature
|
solubility
|
|
(degrees Celsius)
|
(grams/100cc. water)
|
|
25
|
40
|
|
50
|
40
|
|
75
|
40
|
|
100
|
40
|
sodium sulfate
|
temperature
|
solubility
|
|
(degrees Celsius)
|
(grams/100cc. water)
|
|
25
|
55
|
|
50
|
50
|
|
75
|
45
|
|
100
|
41
|
potassium chloride
|
temperature
|
solubility
|
|
(degrees Celsius)
|
(grams/100cc. water)
|
|
25
|
35
|
|
50
|
42
|
|
75
|
50
|
|
100
|
58
|
sodium sulfate
|
temperature
|
solubility
|
|
(degrees Celsius)
|
(grams/100cc. water)
|
|
.70
|
4.71
|
|
10.25
|
9.21
|
|
15.65
|
14.07
|
|
24.90
|
27.67
|
|
27.65
|
34.05
|
|
30.20
|
41.78
|
|
31.95
|
47.98
|
|
33.50
|
49.39
|
|
38.15
|
48.47
|
|
44.85
|
47.49
|
|
60.10
|
45.22
|
|
75.05
|
43.59
|
|
89.85
|
42.67
|
|
101.90
|
42.18
|
Problems:
1. What is the solubility of sodium nitrate at 60 degrees Celsius?
2. What is the solubility of potassium chloride at 90 degrees Celsius?
3. What is the solubility of sodium sulfate at 50 degrees Celsius?
4. What is the solubility of sodium nitrate at 30 degrees Celsius?
