The hydrolysis constant for Z nCl 2 for complete hydrolysis of Zn -2 will beA- Kn-Kw-KbB- Kn-Kb-Kw i2C- Kn-Ku2-Kb2D- Kn-Kw2-Kb

The correct option is D 2n^2+(aq)+2H_2O(aq)⇌ Zn(OH)_2(aq)+2H^+(aq) ∴ K_n= [ Zn(OH)_2 ] [ H^+ ]^2/ [ Zn^++ ] Zn(OH)_2(aq)⇌ 2n^2+(aq)+2OH^ (aq) ∴ K_b= [ 2n^2+( ...

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Byju's Answer

Standard XII

Chemistry

Haber Bosch Process

The hydrolysi...

Question

The hydrolysis constant for $Z n C l_{2}$ for complete hydrolysis of $Z n^{+ 2}$ will be

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Solution

The correct option is B
$2 n^{2 +} (a q) + 2 H_{2} O (a q) ⇌ Z n (O H)_{2} (a q) + 2 H^{+} (a q)$
$∴ K_{n} = \frac{[Z n (O H)_{2}] {[H^{+}]}^{2}}{[Z n^{+ +}]}$
$Z n (O H)_{2} (a q) ⇌ 2 n^{2 +} (a q) + 2 O H^{-} (a q)$
$∴ K_{b} = \frac{[2 n^{2 +} (a q)] {[O H^{-}]}^{2}}{[Z n (O H)_{2}]},$
$K_{w} = [H^{+}] [O H^{-}]$
$∴ \frac{K_{w}^{2}}{K_{b}} = K_{n}$

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The hydrolysis constant for ZnCl2 for complete hydrolysis of Zn+2 will be

The correct option is B 2n2+(aq)+2H2O(aq)⇌Zn(OH)2(aq)+2H+(aq) ∴Kn=[Zn(OH)2][H+]2[Zn++] Zn(OH)2(aq)⇌2n2+(aq)+2OH−(aq) ∴Kb=[2n2+(aq)][OH−]2[Zn(OH)2], Kw=[H+][OH−] ∴K2wKb=Kn

The hydrolysis constant for $Z n C l_{2}$ for complete hydrolysis of $Z n^{+ 2}$ will be