Solutions Solvation And Reading A Solubility Curve Worksheet Template
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3Name _______________________________________ Date ________ Period _______
Solutions, Solvation and Reading a Solubility Curve
For Questions 1-15, use the solubility chart:
1. Which of the salts shown on the graph is the least soluble in water at 10
C?
o
2. Which of the salts shown on the graph has the greatest increase in solubility as the
temperature increases from 30 degrees to 60 degrees?
3. Which of the salts has its solubility affected the least by a change in temperature?
4. At 20
C, a saturated solution of sodium nitrate contains 88 grams of solute in 100 ml of water.
o
How many grams of sodium nitrate must be added to saturate the solution at 50
C?
o
5. At what temperature do saturated solutions of potassium nitrate and sodium nitrate contain the
same weight of solute per 100 mL of water?
6. What two salts have the same degree of solubility at approximately 19
C?
o
7. How many grams of potassium chlorate must be added to 1 liter (1,000 mL) of water to
produce a saturated solution at 50
C?
o
8. A saturated solution of potassium nitrate is prepared at 60
C using 100 mL of water. How
o
many grams of solute will precipitate out of solution if the temperature is suddenly cooled to
30
C?
o
9. What is the average rate of increase for the solubility of KNO
in grams per 100 mL per degree
3
Celsius in the temperature range of 60
C to 70
C?
o
o
10. If 50 mL of water that is saturated with KClO
at 25
C is slowly evaporated to dryness, how
o
3
many grams of the dry salt would be recovered?
11. Thirty grams of KCl are dissolved in 100 mL of water at 45
C. How many additional grams of
o
KCl are needed to make the solution saturated at 80
C?
o
12. What is the smallest volume of water, in mL, required to completely dissolve 39 grams of KNO
3
at 10
C?
o
13. What is the lowest temperature at which 30 grams of KCl can be dissolved in 100 mL of water?
14. Are the following solutions saturated, unsaturated or supersaturated (assume that all three
could form supersaturated solutions)
a. 40. g of KCl in 100 mL of water at 80
C
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b. 120. g of KNO
in 100 mL of water at 60
C
o
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c. 80. g of NaNO
in 100 mL of water at 10
C
o
3
15. Assume that a solubility curve for a gas such as Oxygen, at one atmosphere of pressure, was
plotted on the solubility curve graph. Reading from left to right, would this curve would slope
upwards, slope downwards or remain constant:
For the rest of the questions, use your textbook notes on solutions:
16. Draw a picture of a water molecule (H
O). Label the H’s and O. Label the positive end and the
2
negative end.
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