Solubility Curves

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Solubility Curves
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• Trace the solubility of a substance with
  increasing temp.
• Each curve represents saturation
• Above the curve the solution is supersaturated
• Below the curve the solution is unsaturated

Solubility of NaCl
Unsaturated
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Sample Reading of Graph
Solids inc. with inc. temp.
Sample Reading of Table G At 20?C, 38 grams of
NaCl will just saturate 100 grams of H2O. The
solubility of NaCl at 20?C is 38 grams NaCl per
100 grams H2O.
Gases decline with inc. temp.
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Solubility Curve Problems

• 1) According to Table G, approx how many grams of
  KClO3 are needed to saturate 100 grams of H2O at
  40?C?
• 2) According to Table G, which of the following
  substances is most soluble at 60?C?
• 1) NH4Cl 2) KCl 3) NaCl 4) NH3
• 3) Which compound shows the least increase in
  solubility in water from 50?C to 60?C?
• 1) KCl 2) NaCl 3) KNO3 4) NaNO3