Question

How many grams of concentrated nitric acid solution should be used to prepare 250 ml of 2.0 m hno3? The concentrated acid is 70% hno3?

Answer 1

Answe

ANSWER

The number of moles of nitric acid can be obtained by multiplying the molarity with volume

M×V=Moles of H in HNO3=

1000/250×2=0.5

The mass of nitric acid can be obtained by multiplying the number of mols with molar mass and dividing with percentage concentration.

∴HNO3 required =0.5×63×70/100=45g

Thus 45.0 g conc. HNO3

of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO3

​

.