Sodium and potassium are placed in the same group of modern periodic table. If the molecular formula of sodium sulphate is Na, So, then decide the molecular formula of potassium sulphate. Give reason for your answer.

Sodium and potassium are placed in the same group of modern periodic t

1.	Sodium and potassium are placed in the same group of modern periodic table. If the molecular formula of sodium sulphate is Na, So, then decide the molecular formula of potassium sulphate. Give reason for your answer.
Answer» Solution :Molecular formula of potassium SULPHATE : `K_(2)SO_(4)` If molecular formula of sodium sulphate is `Na_(2)SO_(4)` . It MEANS : `SO_(4)`has valency of 2 and NA has valency of 1. As, Na and K belongs to same group, they will show same valency, HENCE the formula `K_(2) SO_(4)`