Answer :
Barium sulphate is insoluble in water because it has a high lattice energy.
- Salt is composed of two entities, the Ba2+ ion and the CrO4 2- ion. Since both of them are large in size, their interactions are more stabilized due to ionic bonding and van der Waals forces of attraction.
- As a result of this, water is unable to break the bond between these two and hence, it is insoluble in water.
What is called compound?
- In chemistry, a compound is a substance made up of two or more different chemical elements combined in a fixed ratio.
- When the elements come together, they react with each other and form chemical bonds that are difficult to break.
- These bonds form as a result of sharing or exchanging electrons between atoms.
- Barium sulphate is insoluble in water because it has a high lattice energy.
- On adding water in barium Sulphate its hydration energy decreases more rapidly in comparison to its lattice energy.
- And to be soluble in water the component lattice energy should be less than its hydration energy.
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