Chemistry

What is the pH of a solution if two aspirin each containing 500mg of acetylsalicyclic acid were dissolved in 325 ml of water?

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  1. If we call aspirin, HA, then the acid dissociates in water as
    HA ==> H^+ + A^-

    Ka = (H^+)(A^-)/(HA)
    (H^+) = x
    (A^-) = x
    (HA) = moles aspirin/L soln.
    moles aspirin = 2*500/molar mass aspirin.
    L soln = 0.325 L
    Solve for x and convert to pH.
    Post your work if you get stuck.

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    posted by DrBob222
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