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    Calculate the pH

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    Calculate the pH upon diluting 2ml of 2 N HCL to a final volume of 100 ml?

    Calcuate the pH upon addition of 0.0075 mole of solid NaOH to 100 ml of a 0.1 M solution of acetic acid (pKa=4.7)?

    If equal molar amounts of Na2HPO4 and NaJpo4 are mixed in water, calcuate the resulting pH. The pKas of phosphoric acid are 2.1, 7.2, 12.4.

    Calculate the % dissociation of a 0.1M solution of weak acid(pKa=5.0)?

    Which of the following pairs would makw the best buffer at pH10.0?
    a. Acetic acid & sodium acetate
    b. NaH2PO4 & Na2HPO4
    c. H2CO3 & NaHCO3
    d. Methylammonium chloride & Methylamine

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    Solution Preview

    Calculate the pH upon diluting 2ml of 2 N HCL to a final volume of 100 ml?

    HCl is monoprotic therefore 2 N = 2 M (or mol/L)

    Using C1V1 = C2V2 (2 M)(2 mL) = C2 (100 mL)

    And C2 = 0.04 M therefore pH = -log (0.04)

    pH = 1.4

    Calcuate the pH upon addition of 0.0075 mole of solid NaOH to 100 ml of a 0.1 M solution of acetic acid (pKa=4.7)?

    Using the fact that acetic acid will completely react with NaOH to produce ...

    Solution Summary

    This solution involves calculating pH upon dilution and addiction and the % dissociation of an acid solution.

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