NCERT Class XI Chemistry Some Basic Concepts of Chemistry Solutions

Question : 6

Total: 36

Calculate the concentration of nitric acid in moles per litre in a sample which has a density, 1.41 gmL–1 and the mass per cent of nitric acid in it being 69%.

Solution:

69 mass per cent of nitric acid means that 69 g of HNO3 is present in 100 g of solution.
∴ Volume of solution =

Mass

Density

100g

1.41gmL−1

= 70.92 mL
Moles of HNO3 =

= 1.095
Molarity =

Moles‌of‌H‌N‌O3

Volume‌of‌soln.in‌mL

× 1000 =

1.095

70.92

× 1000 = 15.44 M

Go to Question:

Prev Question

Next Question