Question:

Which statement is NOT true for auxiliary complexing agents?

Question options:

a) Auxiliary complexing agents prevent the precipitation of metal hydroxide at high pH.

b)Auxiliary complexing agents are chosen to bind metal strong enough to prevent metal hydroxide precipitation but weak enough to be displaced by EDTA.

c)Low concentrations auxiliary complexing agent changes the end point of the titration.

d) k'f is the effective formation constant for fixed pH and fixed concentration auxiliary complexing agent.

e) Ammonia for example can be used as an auxiliary complexing agents.

f) All these statements are not true.

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