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Calculate the [h3o+] of the following polyprotic acid solution: 0.135 M H2CO3

  • Chemistry -

    k1 and k2 are far enough apart in H2CO3 that k2 can be ignored; therefore, treat this as a monoprotic acid with just k1.
    H2CO3 ===> H^+ + HCO3^-

    k1 = (H^+)(HCO3^-)/(H2CO3)
    Set up an ICE chart, substitute into k1 and solve for H^+.

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