Question

when excess of NH3 is added to copper sulphate solution a
deep blue color complexes is formed...

Answer 1

ANSWER
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CuSO4 + 4NH3 → [Cu(NH3)4]SO4


[Cu(NH3)4]SO4 is (dsp2 hybridised, has one unpaired electrons and is paramagnetic)


Shape of the complex is square planar which arises due to dsp2 hybridisation.

Hybridisation of one 4s, two 4p and one 4d orbitals takes place (dsp2) to give square planar shape.

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