Question

Which of the following cations is not hydrolyzed in aqueous solution ?
(i) `Ba^(2+)` , (ii) `Ca^(2+)`
(iii) `Na^(+)` , (iv) `K^(+)`
A. (i), (ii)
B. (iii), (iv)
C. (i), (ii), (iii), (iv)
D. (i), (ii), (iii)

Answer 1

Correct Answer - C
Salts formed by the reactions between acids and bases (in denfinite proporties) undergo dissociation in water. The cation/anions formed on dissociation of salts either exist as hydrated ions in aqueous solutions or interact with water to reform the corresponding acids/bases depending upon the nature of salts. The latter process of interaction between water and cations/anions or both of salts is called hydrolysis. The pH of the solution gets a affected by this interaction. The cations of strong bases such as `Na^(+), K^(+), Ca^(2+)`, and `Ba^(2+)` simply get hydrated but do not hydrolyze.