Question

In k2 cr(cn)2o2(o2)nh3 what is oxidation state of cr

Answer 1

Answer: -

In the compound K₂[Cr(CN)₂O₂(O₂)NH₃],

The ligands present with their charges are

CN⁻ is cyano group with -1 charge. There are 2 cyano group.

Peroxygen O-O is peroxo group. It has -2 charge.

NH₃ named as ammine group. It is neutral.

Oxygen is oxo group. Each has -2 charge. There are 2 oxygen.

The anionic part must have a total charge of -2.

Thus the oxidation state of Cr = +6.

The full name is potassium ammine dicyano dioxo peroxo-chromate (VI)