why we can't prepare an insoluble base from an insoluble base? What is the trouble behind it?
Answers
Answer:
Copper oxide and other transition metal oxides or hydroxides do not dissolve in water. If the base is insoluble, then an extra step is needed to form a salt. ... You filter the mixture to remove the excess base, and then evaporate the water in the filtrate to leave the salt behind.
Explanation:
Due to high lattice enthalpy and covalent nature, BeO is insoluble in water. In case of ionic BeSO
4
, the hydration enthalpy is much more than its lattice enthalpy. Hence, it is water soluble.
(ii) Oxide ion has smaller size than sulphate ion. BaO has smaller lattice energy than BaSO
4
as bigger cation stablizes bigger anion to greater extent than smaller cation stabilizes bigger anion. Hence, BaO is water soluble and BaSO
4
is water insoluble.
(iii) As per Fajan rules, smaller Li
+
ion polarizes bigger I
−
to a greater extent than K
+
ion. Hence, LiI is more covalent than KI and hence, more soluble in organic solvents such as ethanol.