Question

7. Give reason “CCl4 is insoluble in water while SiCl4 easily get hydrolysed."​

Answer 1

Answer:

SiCl4 is easily hydrolysed by water whereas CCl4 is stable towards hydrolysis in water because silicon has vacant 3d orbital available for further co-ordination with water whereas carbon has no d orbital for bonding.

Answer 2

Answer:

The quantity of a chemical substance that can dissolve in water at a particular temperature is known as its water solubility.

Explanation:

$H_{2} O$ is a polar molecule, whereas $CCl_{4}$ is a covalent one. It is hence insoluble in water.

• Alternately, $CCl_{4}$ is insoluble in water because it lacks d-orbitals that can accommodate the electrons that water molecules' oxygen atoms provide it.
• As a result, $CCl_{4}$  and the water molecules do not interact, making it insoluble in water.

$SiCl_{4}$, on the other hand, possesses d-orbitals that can hold the single pair of electrons that the oxygen atom in water molecules donates.

• The outcome is that $SiCl_{4}$ and water molecules interact strongly.
• $SiCl_{4}$ is thus hydrolyzed by water to produce silicic acid.

Hence, carbon tetrachloride is insoluble in water, while silicon tetrachloride easily gets hydrolyzed because of the presence of d-orbitals in silicon.

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