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College Chemistry

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What is pH buffer of 0.1 mol L-1 Na2HPO4/O.15 mol L-1 KH2PO4?
KH2PO4?
Given Ka(H2PO4-) = 6.2 x 10-8).

I would like to know the correct formula, steps for the answer

Thank you

  • College Chemistry - ,

    pH = pKa + log [(base)/(acid)]
    pH = 7.2 + log (0.1/0.15)
    [H = 7.02.
    Check my work.

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