Ncert Exercises & Solutions

Which of the following compounds are readily soluble in water?

a. ${BeSO}_{4}$

b. ${MgSO}_{4}$

c. ${BaSO}_{4}$

d. ${SrSO}_{4}$

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Solubility of sulphates of alkaline earth metals in water decreases from Be to

Ba \cdot {BeSO}_{4}

are fairly soluble while

{BaSO}_{4}

is almost completely insoluble.

The decreasing solubility of

{BeSO}_{4}

{BaSO}_{4}

can be explained on the basis of decreasing hydration energy from Be²⁺ to Ba²⁺ (as size increases). For BeSO₄ and MgSO₄, hydration energy is more than lattice energy and so they are readily soluble.

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