Question

Please answer Q. No 6 and 7

Answer 1

Not fully sure for 6
but a conjugate acid base pair take together forms neutral solñ so i will go with KaKb=Kw

and for q 7
ans is K1>k2>k3
because on further dissociation of H2Po4. has more affinity towards H and the affinity also increases when HPo4 is dissociated so the Keq decreases