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11 Dec 2019

A 20.0 mL solution containing 0.250 M Ni2+ ion was titrated with 0.0500 M EDTA while the
system was buffered at pH=4.00.

Determine the volume of EDTA needed to reach the
equivalence point.

What is the free Ni2+ ion concentration ([Ni2+]) left in the solution at the
equivalence point?

The formation constant (Kf) for Ni‐EDTA complex is 1018.4.

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Casey Durgan
Casey DurganLv2
13 Dec 2019

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