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March 25, 2017

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Calculate the volume of 2 M acetic acid needed to prepare 50 ml of 0.1 M acetate buffer.

  • Chemistry - ,

    Are you adding NaOH to acetic acid or are you adding sodium acetate to acetic acid.

  • Chemistry - ,

    I'm adding NaOH

  • Chemistry - ,

    ......CH3COOH + OH^-==> CH3COO^- + H2O
    If we started with 2.5 mL of 2M CH3COOH that would be 2.5 x 2 = 5 mmoles. Then we add 2.5 mmoles NaOH which gives us at equilibrium 2.5 mmoles acetate and 5.0-2.5 = 2.5 mmoles CH3COOH.
    Total is 2.5 mmoles CH3COOH + 2.5 mmoles CH3COONa = 5 mmoles total/50 mL = 0.1M

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