Question

Concentrated nitric acid used in laboratory work is 68% nitric acid by mass in the aqua solution what should be the molarity of such sample of as if the density of the solution is 1.4

Answer 1

Letass of hno3 = 68 g

Mass of solution = 100g

Density of solution = 1.4 g/ml

Volume of solution = 100/1.4 = 71.4ml

Molar mass of hno3 = 68

Molarity = (mass of solute

*1000)/ (molar mass of hno3 *Vml)

Molarity = 68*1000/63*71.4

=68000/4498.2

=15.11M

Hope u get that