chemistry lab

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How does the presence of a common ion affect the solubility of a salt? Explain in terms of equilibrium.

  • chemistry lab -

    I can help you through this but I don't want to write it for you. The common ion effect is just an example of Le Chatelier's Principle.

  • chemistry lab -

    Oh that's what it is? Thanks

  • chemistry lab -

    Right. The "common ion effect" is called that because there is a "common ion."
    For example, Ag2CrO4 ==> 2Ag^+ + CrO4^2-
    So if we add AgNO3 the Ag^+ is the common ion.
    If we add Na2CrO4 the CrO4^2- is the common ion. Both decrease the solubility of Ag2CrO4

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