Calculate the Bi^3+ at the following points on the titration of 25cm3 of 0.02M Bi^3+ solution with 0.02M of EDTA at pH=2. After the addition of:

a. 10cm3
b. 24cm3
c. 25cm3
d.26cm3
e. 30cm3.
(Given: stability constant = 10^27.5, and alpha = 10^15.5)

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