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For the list of chemicals below, write complete, balanced equations for all possible reactions that would lead to an insoluble salt.

KCl, BaCl2, AgNO3, Pb(No3)2, K2SO4, HNO3

  • Chemistry - ,

    I answered this the other day for you or another student by giving appropriate information. The secret to this question is to know the solubility rules. Here is a simplified set. Memorize them.
    There will be a reaction between salts in which a solid (precipitate) will form. We usually abbreviate that as ppt. So here is an example.
    2KCl(aq) + Pb(NO3)2(aq) ==> 2PbCl2(s) + 2KCl(aq)

    AgCl is insoluble, too, so
    KCl(aq) + AgNO3(aq) ==> AgCl(s) + KNO3(aq)

    Note that BaSO4 is insoluble; therefore,
    BaCl2(aq) + K2SO4(aq) ==> 2KCl(aq) + BaSO4(s)
    Just go through the list systematically to get all of the possibilities.

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