what are the chemical formula for sodium tetrachloroplatinate(II) and tris(ethylenediamine)cobalt(III) bromide
Na2[PtCl4]
[Co(en)3]Br3
To find the chemical formula for sodium tetrachloroplatinate(II) and tris(ethylenediamine)cobalt(III) bromide, we need to understand the naming conventions for coordination compounds.
1. Sodium tetrachloroplatinate(II)
To determine the chemical formula, we need to identify the individual components and their respective charges.
- The "sodium" part suggests that the compound contains a sodium ion, Na⁺.
- The "tetrachloroplatinate(II)" part indicates that it contains a tetrachloroplatinate(II) complex ion, [PtCl₄]²⁻.
To balance the charges, we need two sodium ions to neutralize the -2 charge of the tetrachloroplatinate(II) complex ion. Therefore, the chemical formula for sodium tetrachloroplatinate(II) is Na₂[PtCl₄].
2. Tris(ethylenediamine)cobalt(III) bromide
Again, we need to identify the individual components and their charges:
- "Tris(ethylenediamine)" suggests that it contains three ethylenediamine ligands, which have the formula [H₂NCH₂CH₂NH₂].
- "Cobalt(III)" indicates that the central metal ion is cobalt with a +3 charge, Co³⁺.
- "Bromide" refers to bromine, which carries a -1 charge, Br⁻.
To balance the charges, we need three bromide ions to counteract the +3 charge of the cobalt ion. Therefore, the chemical formula for tris(ethylenediamine)cobalt(III) bromide is [Co(en)₃]Br₃, where en represents the ethylenediamine ligand.
Remember that the square brackets are used to indicate a complex ion in the chemical formula.
The chemical formula for sodium tetrachloroplatinate(II) is Na2PtCl4.
The chemical formula for tris(ethylenediamine)cobalt(III) bromide is [Co(en)3]Br3, where 'en' represents the ethylenediamine ligand.