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Chemistry

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(a) What is the pH of 50 mL of a 0.2M glycolic acid aqueous solution after adding 5 mL of 0.25 M KOH? The pKa of glycolic acis is 3.83 at 25 Celsius.


(b) Classify each of the following compounds as either "acidic", "basic", or "amphoteric" (able to act as either an acid or a base).

i)K2O =



ii) Al(OH)3 =



iii) Si(OH)4 =



iv) CaO =

  • Chemistry -

    K2O - basic
    Al(OH)3 - amphoteric
    Si(OH)4 - acidic
    CaO - basic

  • Chemistry -

    what about a?

  • Chemistry -

    a) 2.9844

  • Chemistry -

    a) 2.9844
    b)K2O = basic
    Al(OH)3 = amphoteric
    Si(OH)4 = acidic
    CaO = basic

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