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Posted by on Tuesday, October 4, 2011 at 3:52pm.

Identify the two conjugate acid-base pairs in each of the following:

A) H2PO4^-(aq) + HSO4^-(aq) = H3PO4(aq) + SO4^2-(aq)

B) HI(aq) + CN^-(aq) = HCN(aq) + I^-(aq)

i got
a) H2PO4^- , HSO4^- and SO4^2-
b) CN^- and I^-
But i don't think that these are right, please help!

  • chemistry 12 - , Tuesday, October 4, 2011 at 4:34pm

    The question asks for PAIRS (meaning it want a pair for each).
    A is H2PO4^-/H3PO4; and HSO4^-/SO4^2-
    B is HI/I^-; and CN^-/HCN
    Note: for B, CN^- is the base and HCN is the conjugate acid while HI is an acid and I^- is the conjugate base.

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