Question

Determine the oxidation state of the metal ion in [Co(NH3)3Cl3]−.

Answer 1

Explanation:

oxidation state of metal is +2

Answer 2

The oxidation state of the metal ion in  [Co(NH₃)₃Cl₃]⁻ is 2:

• The given compound [Co(NH₃)₃Cl₃]⁻ is a type of coordination compound.
• We will assume the oxidation state of the metal ion (Co in this case) to be y.
• We know that the overall charge on the compound is -1.
• The compound contains two types of groups i.e. ammine (NH₃) which is neutral and has a charge of 0, Chlorine (Cl) which is negative and has a charge of -1.
• Now, we will equate the charge outside the bracket to the sum of the charges on the groups inside the bracket.

y + (0×3) + (-1×3) = -1

y + 0 - 3 = -1

y = 3 - 1

y = 2

Thus, the oxidation state of the metal ion in  [Co(NH₃)₃Cl₃]⁻ will be +2.