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In a 0.2M aqueous solution of Ethylene d...

In a `0.2M` aqueous solution of Ethylene diamine `(H_(2)NCH_(2)CH_(2)NH_(2)):`
Given `K_(b_(1))=8xx10^(-5)` & `K_(b_(2))=2.7xx10^(-8)`

A

`[OH^(-)]=2xx10^(-2)M`

B

`[C_(2)N_(2)H_(10)^(2+)]=2.7xx10^(-8)M`

C

Both (A) and (B)

D

None of these

Text Solution

Verified by Experts

`[OH^(-)]=sqrt(K_(b_(1))xxC)=sqrt(1.6xx10^(-5))=4xx10^(-3)M`
`K_(b_(1))xxK_(b_(2))=([OH^(-)]^(2)[C_(2)H_(10)N_(2)^(2+)])/([C_(2)H_(6)H_(8)])rArr 8xx2.7xx10^(-13)=(16xx10^(-3)[C_(2)H_(10)N_(2)^(2+)])/(0.2)`
`:.[C_(2)H_(10)N_(2)^(2)]=2.7xx10^(-8)M`
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RESONANCE-IONIC EQUILIBRIUM-Part -II (only one option correct type)
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