Question

How many hydrate isomers of $\left[Fe\right(H_{2}O{)}_6]C{l}_3$ are possible?

Answer 1

Hydrate isomers of $\left[Fe\right(H_{2}O{)}_6]C{l}_3$ are:

(I) $\left[Fe\right(H_{2}O{)}_{5}Cl]C{l}_2\cdot H_{2}O$

(II) $\left[Fe\right(H_{2}O{)}_{4}C{l}_2]Cl\cdot 2H_{2}O$

(III) $\left[Fe\right(H_{2}O{)}_{3}C{l}_3]\cdot 3H_{2}O$

Thus, 3 hydrate isomers are possible.