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When 0.1 mol arsenic acid (H(3)AsO(4)) i...

When `0.1` mol arsenic acid `(H_(3)AsO_(4))` is dissolved in 1L buffer solution of `pH=8` , which of the following hold good? For arsenic acid : `K_(1)=2.5xx10^(-4), K_(2)=5xx10^(-8), K_(3)=2xx10^(-13)` ['lt' sign denotes that the high concentration is at least more than 100 times the lower one]

A

`[H_(3)AsO_(4)]lt[H_(2)AsO_(4)^(2-)]`

B

`[H_(2)(AsO_(4)^(-)]lt[HAsO_(4)^(2-)]`

C

`[HAsO_(4)^(2-)]lt[H_(2)AsO_(4)^(-)]`

D

`[AsO_(4)^(3-)lt[HAsO_(4)^(2-)]`

Text Solution

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The correct Answer is:
a,d
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