chemistry-acids and bases

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determine how many mL's of a monohydroxic base with a pH of 9 is needed to neutralize 50 mL of a monoprotic acid with a pH of 2. I do not understand what to do. can someone please help?

  • chemistry-acids and bases -

    the H+ must equal the OH-

    H+=10^-9=> OH=10^-5
    H+=10^-2

    50*10^-2=V*10-5
    V=50ml*10^3 or 50 liters

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