Problem- please provides the formula for the listed coplex, Ask an Expert

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Problem- Please provides the formula for the listed coplex ions/compounds below. If you could explain the conventions and rules you used.

a) The trioxalatocobaltate(II) was a dark blue in color.

b) The triglycinatocobalt(II) was purple in color.

c) The tricarbonatocobalte(III) was pale yellow in color.

d) The hexaaquacobalt(III) was aqua green in color.

e) The triscobalt(III) was clearish yellow in color.

I want you to clarify the physics in this above problem.

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