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For poly basic acid , the dissociation c...

For poly basic acid , the dissociation constant have a different valves for each step.
`H_(3)AhArrH^(+)+A,Keq=Ka_(1)`
`H_(2)AhArrH^(+)+A^(-2),Keq=Ka_(2)`
`HA^(2)hArrH^(+)+A^(3-),Keq=Ka_(3)`
What is the observed trend of dissociation constant im successive stages ?

A

`Ka_(1)gtKa_(2)gtKa_(3)`

B

`Ka_(1)=Ka_(2)=Ka_(3)`

C

`Ka_(1)ltKa_(2)ltKa_(3)`

D

`Ka_(1)=Ka_(2)+Ka_(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
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