As two ions are produced in a solution and 1 mole AgCl is precipitated out so Cl would be present outside the bracket of the coordination compound and is the counter anion.
The structural formula of the compound is [Cr(H2O)4Cl2]Cl .
While naming the compound since the counter anion Cl carries a negative charge, therefore the charge on the complex will be one. As there are 2 chloride ions both having a total of -2 charge, water is neutral so zero and 1 charge being on the ligand so the oxidation number of chromium would be,
X=3 is the oxidation number.
Name of the compound is tetraaquadichromium(III)Chloride.
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