Question

Write the formula for Tetraammineaquachlorido
cobalt(III) chloride.

Class 12
Coordination compounds

Answer 1

Hey !!

Formula for Tetraammineaquachlorido  cobalt(III) chloride is

   [Co(NH₃)₄(H₂O)Cl]Cl₂

Good luck !!

Answer 2

The formula for Tetraammineaquachloridocobalt(III) chloride is $[Co(NH_3)_4(H_2O)Cl]Cl_2$

Explanation:

• To write the formula from the name of the compound, the formula of the individual components present in the compound must be first identified.
• As the given compound is a coordination compound, to derive the formula, parts such as cations, ligand and anions must be first identified.
• Accordingly in the given compound the name and components are as follows:

Central metal atom:

Cobalt - Co

Ligands:

• Tetraammmine - $(NH_3)_4$
• aqua - $H_2O$
• Chlorido - $Cl$

Counter anion:

• Chloride - $Cl_2$

Steps to write the formula:

1. The square bracket must be opened first.
2. The components present in the square bracket is the cation part of the compound.
3. In the cation part, the central metal atom must be written first followed by ligands in alphabetical order.
4. The square bracket must be closed.
5. Outside the square bracket counter, anion must be written.

• The formula for Tetraammineaquachloridocobalt(III) chloride according to above-mentioned steps is  $[Co(NH_3)_4(H_2O)Cl]Cl_2$.

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