Solubility Product Constant

• Ag2S(s) ? 2Ag+(aq) + S2-(aq)

  Ksp = [Ag+]2[S2-] = 1.0 x 10-51
  

• We can directly compare only those salts that have the same exponents in the solubility product expression.

• If that condition is met, the lower the value of Ksp, the less soluble the salt.

• Ksp can be used to calculate the solubility, which can be compared for any salts.

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