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Problem- You are titrating 150.0 mL of 0.070 M Ca2 with 0.070 M EDTA at pH 9.00. Log Kf for the Ca2 -EDTA complex is 10.65, and the fraction of free EDTA in the Y4 form, Y4â, is 0.041 at pH 9.00.

a) What is K\'f, the conditional formation constant, for Ca2 at pH 9.00?

b) What is the equivalence volume, Ve, in milliliters?

c) Calculate the concentration of Ca2 at V = 1/2 Ve

d) Calculate the concentration of Ca2 at V = Ve.

e) Calculate the concentration of Ca2 at V = 1.1 Ve.

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