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Complexometric titration

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  • 1. Multiple Choice
    30 seconds
    1 pt

    General Requirements for a Good Metallochromic

    Indicator are the following, except:

    have two distinct colors

    The color reaction of the indicator with the metal should be specific

    The metal- indicator complex should have sufficient stability, but it should be less stable than metal-EDTA complex

    The metal- indicator complex should have sufficient stability, but it should be more stable than metal-EDTA complex

  • 2. Multiple Choice
    30 seconds
    1 pt

    Murexide form satble complex with all the following metals, except:

    Ca+2

    Co+

    Mg+2

    Ni+

  • 3. Multiple Choice
    30 seconds
    1 pt

    the back titration is useful in the following cases, except:

    If the metal ion precipitate at the pH of the titration

    If there is no suitable indicator

    if the sample is soluble in water

    If the reaction between EDTA and the metal ion is too slow

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