Question

2 poin QUESTION 5 What is the value of conditional formation constant, Kr. for the EDTA-complex with Cu2+ at pH 10.07 Kr(Cuy) - 6.03x1018 Cu2+ + EDTA CuY2 (Use Table 11-1 in the textbook as a reference.) 1.2.01 x 1019 2.1.81 x 1018 3.3.21 x 1015 O4 7.66 x 10-20 5.6.03 x 1018 QUESTION 6 2 poir Consider titration of 24.00 ml of 0.0880 M Cuat solution with 0.110 M EDTA at pH 10.0. Find the concentration of free Cu2+ at the equivalence point of this titration. (Just a tip: you may need to use the value of the conditional formation constant, kf, which you calculated in Problem 5 above, for the complex CuY2. at pH 10.0.) 01.125 x 10-7M 2.8.72 x 10-10 M 3.6.23 x 10-5 4 3.25 x 10-10M 5.1.64 x 10-10 M

Answer 1

I tried all possibilities for question 6 .answer is not there.the answer should be around 10^-18.

So I am uploading answer for Q.5

form table 204 at (pH = 10) = 0-30 conditional formation constant Kf = ky due kg (u) = 6:03x108 : k;' = 6.03*16*X0.30 Hy' = 4081 x168 CutHEDTA --> 4y2- Answer: 6. 1.81X1108