Solubility Worksheet With Answers Page 3
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810) A sample of potassium nitrate (49.0 g) is dissolved in 101 g of water at 100 °C, with precautions
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taken to avoid evaporation of any water. The solution is cooled to 30.0 °C and a small amount of
precipitate is observed. This solution is __________.
A) unsaturated
B) supersaturated
C) hydrated
D) saturated
E) placated
11) The solubility of MnSO 4 monohydrate in water at 20 °C is 70.0 g per 100.0 mL of water. A solution
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at 20 °C that is 4.22 M in MnSO 4 monohydrate is best described as a(n) __________ solution. The
formula weight of MnSO 4 monohydrate is 168.97 g/mol.
A) saturated
B) unsaturated
C) supersaturated
D) solvated
E) hydrated
12) A solution is prepared by dissolving 23.7 g of CaCl 2 in 375 g of water. The density of the resulting
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solution is 1.05 g/mL. The concentration of CaCl 2 is __________% by mass.
A) 5.94
B) 6.24
C) 0.0594
D) 6.32
E) 0.0632
13) The concentration of urea in a solution prepared by dissolving 16 g of urea in 39 g of H 2 O is
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__________% by mass. The molar mass of urea is 60.0 g/mol.
A) 29
B) 41
C) 0.41
D) 0.48
E) 0.29
14) The concentration of nitrate ion in a solution that contains 0.900 M aluminum nitrate is __________
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M.
A) 0.450
B) 0.300
C) 2.70
D) 1.80
E) 0.900
15) The concentration of KBr in a solution prepared by dissolving 2.21 g of KBr in 897 g of water is
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__________ molal.
A) 2.46
B) 0.0186
C) 2.07 × 10 -5
D) 0.0167
E) 0.0207
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