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From what acid and what base are the following salts made: KBr, NH4NO3, and BaCl2?

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    Cation comes from base. Anion comes from acid.
    KBr must have come from KOH and HBr.
    NH4NO3 must have come from NH3 and HNO3.
    See how easy that is? Just write the cation and anion, then add OH to the cation and H to the anion. (NH4NO3 doesn't work quite that way; you must be aware that NH3 + HOH ==> NH4^+ + OH^-.)
    BaCl2 must have come from Ba// and //Cl.

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