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Assoli18 [71]
3 years ago
14

What are the respective central-metal oxidation state, coordination number, and overall charge on the complex ion in Na2[Cr(NH3)

2 (NCS)4]?
Chemistry
1 answer:
Elden [556K]3 years ago
6 0

Answer:

Central-metal oxidation state: +2

Coordination number: 6

Overall charge: -2

Explanation:

In the ion complex:

Na₂[Cr(NH₃)₂(NCS)₄]

The central-metal is Cr, the ligands are NH₃ and NCS.

The NH₃ is a neutral ligand, while NCS is an anionic ligand with -1 in charge.

The overall charge of the complex is:

2Na⁺ +  [Cr(NH₃)₂(NCS)₄]⁻² → <em>-2</em>

As NCS gives -1 in charge and there are four NCS, The Cr must be in <em>+2</em> of oxidation state to give an overall charge of -2.

As Cr is bonded to 2 NH₃ and 4 NCS, the coordination number is 2+4 = <em>6</em>

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I hope it helps!

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