Question -
Answer -
Mass percent of nitric acid in the sample = 69 % [Given]
Thus, 100 gof nitric acid contains 69 g of nitric acid by mass.
Molar mass of nitric acid (HNO3)
= {1 + 14 + 3(16)} g mol–1
= 1 + 14 +48
= 63 g mol–1
∴ Number ofmoles in 69 g of HNO3
Volume of 100g of nitric acid solution
Concentration of nitric acid
∴Concentrationof nitric acid = 15.44 mol/L