solubility
DESCRIPTION
solubility ninth grade IGTRANSCRIPT
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General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc. 1
Solubility
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General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc. 2
Solubility is the maximum amount of solute that dissolves in a
specific amount of solvent expressed as grams of solute in 100 grams of solvent
(usually water):
g of solute100 g water
Solubility
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General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc. 3
Unsaturated Solutions
Unsaturated solutions contain less than the
maximum amount of solute
can dissolve more solute
Dissolved solute
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General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc. 4
Saturated Solutions
Saturated solutions contain the maximum amount of
solute that can dissolve some undissolved solute
at the bottom of the container
Dissolvedsolute
Undissolvedsolute
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General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc. 5
At 40 C, the solubility of KBr is 80 g/100 g of H2O.Identify the following solutions as either (S) saturated
or (U) unsaturated. Explain.
A. 60 g KBr added to 100 g of water at 40 C.
B. 200 g KBr added to 200 g of water at 40 C.
C. 25 g KBr added to 50 g of water at 40 C.
Learning Check
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General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc. 6
A. U 60 g of KBr/100 g of water is less than the
solubility of 80 g of KBr/100 g of water.
B. S 200 g KBr added to 200 g of water at 40 C. This is the same as 100 g of KBr in 100 g of
water, which is more than the solubility of 80 g
of KBr/100 g of water at 40 C.
C. U 25 g KBr added to 50 g of water at 40 C. This is the same as 50 g of KBr in 100 g of water, which is less than the solubility of 80 g of KBr/100 g of water at 40 C.
Solution
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General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc. 7
Effect of Temperature on SolubilitySolubility depends on
temperature of most solids increases
as temperature increases
of gases decreases as temperature increases