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单词 solubility product
释义
solubility product

Physics
  • Symbol Ks. The product of the concentrations of ions in a saturated solution. For instance, if a compound AxBy is in equilibrium with its solution

    AxByxA+(aq)+yB(aq)

    the equilibrium constant is

    Kc=[A+]x[B-]y/[AxBy]

    Since the concentration of the undissolved solid can be put equal to 1, the solubility product is given by

    Ks=[A+]x[B-]y

    The expression is only true for sparingly soluble salts. If the product of ionic concentrations in a solution exceeds the solubility product, then precipitation occurs.


Chemistry
  • The product of the concentrations of ions in a saturated solution. For instance, if a compound AxBy is in equilibrium with its solution

    AxBy(s)xA+(aq)+yB-(aq)

    the equilibrium constant is

    Kc=[A+]x[B-]y/[AxBy]

    Since the concentration of the undissolved solid can be put equal to 1, the solubility product is given by

    Ks=[A+]x[B-]y

    The expression is only true for sparingly soluble salts. If the product of ionic concentrations in a solution exceeds the solubility product, then precipitation occurs.


Geology and Earth Sciences
  • Constant which describes the product of ionic concentrations of any slightly soluble salt. The solubility of a substance is the maximum amount of that substance which can be dissolved in a solution that is in equilibrium with a solid source of the solute. The main technique for studying solubility involves the use of the solubility product, which is the total number of ions of each type in a compound that can coexist in a solution. At a given temperature and at equilibrium the value for the solubility product will always be the same. For example, in a solution of silver chloride, AgCl dissociates to Ag+ and Cl. The solubility product Ksp is the product of their concentrations: Ksp = [Ag+][Cl] mole2/litre2. The solubility of AgCl in moles per litre is equal to the activity of Ag+ or Cl as one mole of AgCl dissolves in water to give one mole of each in solution. The value of Ksp for AgCl at 25°C is 10−9.8.


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