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Chemistry

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Calculate the KA of formic acid if 2.3 g of it is dissolved in 1 litre of water to give [H+] of 0.003 M.

  • Chemistry - ,

    mols HCOOH = grams/molar mass, then
    M = mols/L soln. I get about 0.05M but you should confirm that.
    .........HCOOH + H2O ==> H3O^+ + HCOO^-
    I .......0.05..............0.......0
    C.......-0.003.........0.003..0.003
    E...0.05-0.003.........0.003...0.003

    Substitute from the ICE chart above into the IKa expression and solve for Ka.

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