Calculate the mass percent of different elements present in Sodium Sulphate (Na2SO4).



Q.2 :- Calculate the mass percent of different elements present in Sodium Sulphate (Na2SO4).

 

Answer:-



Molar mass of Na2SO= [(2 × 23.0) + (32.00) + 4 (16.00)] = 142 g

Mass percent of an element = (Mass of that element in compound/Molar mass of that compound) × 100

∴ Mass percent of sodium (Na): (46/142) × 100 = 32.39%

Mass percent of sulphur(S): (32/142) × 100 = 22.54%
Mass percent of oxygen:(O): (64/142) × 100 = 45.07%