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Compare D0 for CrCl63- and Cr(CN)63- and predict how increasing the positive charge on a metal...

Compare D0 for CrCl63- and Cr(CN)63- and predict how increasing the positive charge on a metal center translates into a change in D0

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Answer #1

In [CrCl6]3- and [Cr(CN)6]3-, the oxidation state of Cr is +3

Thus, o is influenced by the strength of lignnds.

As per spectrochemical series CN- has more strength than Cl-

Thus, o  [Cr(CN)6]3- will be greater than [CrCl6]3-

Similarly, the change in oxidation state of central metal atom can also change the o for e.g. from +1,+2 to +3, the maximum o will be for the metal ion with +3.

or in other words

Increase in oxidation number results in the increase in o

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