chemistry

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Which of the following is not amphiprotic?

a)H2O
c)NH4+
e)all choices are amphiprotic
b)HSO4 –
d)H2PO4–

need help!

  • chemistry -

    Do you know what amphiprotic means? It means the material can act both as an acid and a base. H2O can do that.
    H^+ + H2O ==> H2O^+
    H2O + H2O ==> H2O^+ + OH^-

    What about HSO4^-? it can donate a proton as in the first equation below; it can accept a proton as in the second equation.
    I can get HSO4^- ==> H^+ + SO4^- or
    HSO4^- + H^+ ==> H2SO4

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