PDF Notes: Lecture_4

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    What is the purpose of acid-base titration?

    Determines the concentration of an acid or base.

    How does direct titration differ from double indicator titration?

    Direct titration uses one indicator; double uses two for complex acids.

    What happens if the dissociation constant is less than 10^-7?

    The acid or base is considered weak and cannot be determined directly.

    What is a characteristic of strong acids in titration?

    They are titrated against NaOH using pH indicators.

    What type of indicator is used for weak acids?

    pH indicators, not M.O. indicators.

    What is the significance of the ratio of ionization constants in double indicator titration?

    It must be at least 10^4 for clear inflection points.

    What is the first equivalence point pH for diprotic acid titration?

    Calculated as ½ (pK1 + pK2).

    What defines a polyprotic acid?

    It can donate more than one proton during titration.

    What is the role of glycerol in titrating boric acid?

    It enhances the acidity of boric acid.

    What type of acids are titrated with NaOH using pH indicators?

    Weak acids like acetic acid and formic acid.

    What is the endpoint for titrating strong bases?

    Determined using M.O. or pH indicators.

    What is the implication of using two indicators in double indicator titration?

    It allows for accurate determination of multiple endpoints.

    What is the pH at the second equivalence point for diprotic acid?

    Calculated as ½ pKw + ½ pKa - ½ pCs.

    What happens during the titration of a mixture of HCl and acetic acid?

    It requires careful selection of indicators for accurate results.

    What is the consequence of using an unsuitable indicator in titration?

    It can lead to inaccurate endpoint determination.