Question

Which of the following properties don't help in differentiating, different hydrated isomers of $CrC{l}_3.6H_{2}O$ ?

• A. Conductivity measurements
• B. Precipitation by $AgN{O}_3$
• C. Dipole moment
• D. Magnetic moment

Answer 1

Answer: (D)

Different hydrated

$(4)$ Hydrated isomers of $CrC{l}_3\cdot 6H_{2}O$ are :

$(i)\left[Cr{\left(H_{2}O\right)}_6\right]{\left(Cl\right)}_3$

$(ii)\left[Cr{\left(H_{2}O\right)}_{5}Cl\right]{\left(Cl\right)}_2\cdot H_{2}O$

(iii) $\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_4{\mathrm{Cl}}_2\right]\mathrm{Cl}\cdot 2{\mathrm{H}}_2\mathrm{O}$

They all have different conductivity, dipole moment and precipitation by $AgN{O}_3$ , They all have similar magnetic moment because in all complexes, ligands are weak field. $C{r}^{+3}$ has $3$ unpaired $e-$