Which of the following cations is not hydrolyzed in aqueous solution ?

1.	Which of the following cations is not hydrolyzed in aqueous solution ? (i) Ba^(2+),(ii) Ca^(2+) (iii) Na^(+),(iv) K^(+)
Answer» (i), (ii) (iii), (iv) (i), (ii), (iii), (iv) (i), (ii), (iii) Solution :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.

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