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how do i predict a conjugate a base?

Ex: HBr. The conjugate base is Br-

a. NH4+
b. H2O
c. H2PO4

  • chemistry -

    It's easy. Really nothing to it.
    Acids have another H. Bases have fewer H.The problem tells you what is printed is an acid. Take away a H to get the base.

    SO, NH4^+ is the acid; NH3 is the base.
    H2O is the acid; OH^- is the base.

  • chemistry -

    ha :) thanks so much, that helps lots, i don't know why i was over thinking it! you're awesome!

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