Question

If the pOH of a nitric acid (HNO3) solution is measured as 11, what is the concentration of HNO3 solution?

2 × 10-3 M
1 × 10-3 M
1 × 10-11 M
3 × 10-3 M

Answer 1

1 gram of HNO3 will be equal to 1/63.01 moles. Therefore, we can say that 1 liter of Nitric acid contains 15.6976 moles or in other words molarity of 70% (w/w) Nitric acid is equal to 15.6976 M.

Known values

Molecular weight of HNO3 63.01 g/mole

Concentration of Nitric acid 70% (% by mass, wt/wt)