A coordination compound CrCl3 .4H2O precipitates AgCl when treated with AgNO3. The molar conductance of the solution of coordination compound corresponds to a total of two ions. Write structural formula of the compound and name it.
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+0-2=1
X=3 is the oxidation number.
Name of the compound is tetraaquadichromium(III)Chloride.