For every diprotic acid of the type `H_(2)X`, how would you relate ionisation constant `K_(a1)` and `K_(a2)`

For very diprotic and of the type H_(2)X ,how would you relate the ionisation constants K_(a_(1)) and K_(a_(2)) ?

For a diprotic acid, which of the following is true for 1^(st) and 2^(nd) ionisation constant ( K_(a_1) and K_(a_2) ?

STATEMENT-1: When 0.1 M weak diprotic acid H_(2)A dissociated with its dissociation constants K_(a_1)=10^(-3) and K_(a_2)=10^(-8) , then [A^(2-)] is almost equal to 10^(-3) M STATEMENT-2: Since K_(a_2)ltltK_(a_1) for 0.1 M H_(2)A,so[A^(2-)] is negligible w.r.t. [HA^(-)]

A saturated solution of H_2S in water has concetration of approximately 0.10 M. What is the pH of this soluton and equilibrium concentrations of H_2S,HS^(-) and S^(2-) ? Hydrogen sulphide is a diprotic acid and its dissociation constants are K_(a_1)=9.1xx10^(-8) ,K_(a_2)=1.3xx10^(-3) "mol L"^(-1) respectively.

Assertion : Acids that have more than one proton that can be donated to base are called polyrotic acids. Reason : For all diprotic acids, the equilibrium constant K_(a_(2)) for the second stage of ionisation is smaller than the equilibrium constant, K_(a_(1)) , for the first stage of ionisation.

If K_(a_1),K_(a_2) and K_a_3) be the first, second and third dissociation constant of H_(3)PO_(4) and K_(a_1)gtgt K_(2_a) gtgtK_(a_3) whis is/are correct :

If K_(a_1),K_(a_2) and K_a_3) be the first, second and third dissociation constant of H_(3)PO_(4) and K_(a_1)gtgt K_(2_a) gtgtK_(a_3) whis is/are correct :