What is the pH of a 0.10 M solution of ethylene diaminetetra acetic acid (edta).`k_(a_(1))=1 xx 10^(-2), K_(a_(2))=2.1 xx 10^(-3), K_(a_(3))=6.9 xx 10^(-7) and K_(a_(4))=5.5 xx 10^(-11)`.

Answer

The only two major contributions to the concentration of Hare from the first two ionisation steps.