Coordination Compounds Part 2

Formula for Mohr's salt is (NH4)2‌Fe(SO4)2‌.6‌H2‌O.
∴ Number of water molecule in Mohr' salt =6.
Formula for potash alum is K2SO4Al2(SO4)3.24H2O.
∴ Number of water molecules in potash alum is 12.
∴ Ratio of water molecules in Mohr's salt and potash alum is

6

24

=

1

−4

=2.5×10−1