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Conditional Formation constant - EDTA

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Question 1:
a) How many millimeters of 0.0700 M EDTA are required to react with 50.0 mL of 0.0140 M Cu2+?

b) With 50.0 mL of 0.0140 M Sc3+?

Question 2:

a) Find the conditional formation constant for Sr(EDTA)2- at pH 11.00, where log Kf is 8.72 and αY4- is 0.81. = _________

b) Find the concentration of free Sr2+ in 0.65 M Na2[Sr(EDTA)] at pH 11.00. [Sr2+] = ________M


The conditional formation constant is given by

Where is the fraction of EDTA in the form Y4- at the given pH, and Kf is the formation constant for the given metal-EDTA complex.

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Solution Summary

Problems dealing with conditional formation constant in EDTA titrations are solved.

Solution Preview

You have to use the conditional formation constant in order to find the free concentration of Sr2+. Assuming all the initial concentration forms product, you then assume some of the product forms reactant.

Question 1:
a) ...

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