Chemistry 30

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Solutions Practice Questions

Practice Questions 3.2: Solubility Curves and Solubility Tables
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1.

Use a solubility curve to determine the solubility of the following compounds at the temperatures given.

compound
temperature
solubility
NH3
10°C
 
Ce2(SO4)3
50°C
 
KCl
90°C
 

2.

For each of the following solutions, classifiy the solution as unsaturated, saturated, or supersaturated.

compound
temperature
mass solute
in 100 mL water
solution
NH3
90°C
10g
 
NH4Cl
80°C
70g
 
NaNO3
30°C
80g
 

 


3.

What is the solubility of ammonium chloride, NH4Cl, at 100°C? Express this both as g ·100mL-1 and as mol·L-1


4. What mass of potassium chlorate, KClO3 could be dissolved in 100mL of water at 70°C?

5. What would happen if a saturated solution of potassium chloride, KCl, in 100g of water was cooled from 80°C to 40°C?

6. Use a Table of Solubility of Common Compounds to predict whether or not the following compounds will be soluble in water at 25°C.
 
Mg(NO3)2   CaSO4 .
CaCl2   K2SO4  
Al2S3   Ba(OH)2  
(NH4)3PO4   Mg(OH)2  
SrCO3   BeS  
BaSO4   CuCl2  
Mg(CH3COO)2   CuCl  
SrI2   H2CO3  
PbS   Ag2SO4  
Ra(NO3)2 . PbI2  
  Check your answers
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Credits | Central iSchool | Sask Learning | Saskatchewan Evergreen Curriculum | Updated: 22-May-2006