Solubility

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Solubility Predicting Products
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Solubility

• When a compound is soluble it dissolves in water
• In some reactions we combine two soluble salts to
  form an insoluble salt, a precipitate
• Insoluble salts, precipitates, are solids
• Compounds that are soluble have the state of
  matter aqueous (aq)

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Predicting Solubility and Insolubility
Compounds Solubility Exceptions
Salts of alkali metals and ammonia Soluble Some lithium compounds
Nitrate salts and chlorates Soluble Few exceptions
Sulfate salts Soluble Compounds of Pb, Ag, Hg, Ba, Sr, and Ca
Chloride salts Soluble Compounds of Ag and some compounds of Hg and Pb
Carbonates, phosphates, chromates, sulfides, and hydroxides Most are insoluble Compounds of alkali metals and of ammonia
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Predicting Products

• Step 1 Identify the type of reaction
• Step 2 Write the new compounds
• Step 3 Check the solubility chart, and include
  states of matter
• Step 4 Balance the equation!

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Predicting Products Example

• Identify the precipitate formed when solutions of
  these ionic compounds are mixed.
• H2SO4 BaCl2 ? ??
• Step 1 Identify the type of reaction
• -It has two compounds that are both ionic
  compounds Double Replacement

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• H2SO4 BaCl2 ? ??
• Step 1 Identify the type of reaction
• -It has two compounds that are both ionic
  compounds Double Replacement
• Step 2 Write the new compounds
• BaSO4 HCl
• Step 3 Add states of matter
• BaSO4 (s) HCl (aq)
• Why is Barius Sulfate a solid? It falls under the
  Exceptions column for Sulfate salts. See the
  solubility chart)

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• Step 4 Balance the equation!
• H2SO4 BaCl2 ? BaSO4 (s) 2HCl (aq)
• Try this on your own!
• Do the Balancing Activity Worksheet and the
  Prediciting Products Worksheet