1. Tardigrade
  2. Question
  3. Chemistry
  4. Barium ions, CN - and Co 2+ form an ionic complex. If this complex is 75 % ionised in aqueous solution with van't Hoff factor (i) equal to four and paramagnetic moment is found equal to 1.73 BM (due to spin only) then, the hybridisation state of Co (II) in the complex will be

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Q. Barium ions, $CN ^{-}$ and $Co ^{2+}$ form an ionic complex. If this complex is $75 \%$ ionised in aqueous solution with van't Hoff factor $(i)$ equal to four and paramagnetic moment is found equal to $1.73 \,BM$ (due to spin only) then, the hybridisation state of $Co (II)$ in the complex will be

Coordination Compounds

Solution:

$\alpha=\frac{i-1}{(n-1)} ; \frac{4-1}{(n-1)}=\frac{3}{4}$

So, $n=5,$ hence given complex must dissociate into five ions $= Ba _{3}\left[ Co ( CN )_{5}\right]_{2}$

Paramagnetic moment indicates one unpaired electron

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