Question

Nitric acid has a molarity of 16.0 M and molality is 37.75 m. Calculate the density, mass% and mole fraction of nitric acid in the solution.

Answer 1

Answer::

Diameter of nitric acid solution=1.4gmcm^-3

Diameter of 100 gm solution=100÷1.04

=96.15cm^3 =96.15×10^-3dm^3

Molarity::

Mass of solute÷molar mass of solute×volume of solute in L

63÷63×96.15×10^-3

=1.04mol/L

63% HNO3 means 6.3 gram HNO3 present in 100 gram of solution

Mass of water =100 - 6.3=93.7g

MOLARITY OF HNO3=

mass of HNO3 ÷molar mass of

HNO3×mass of solvent (kg)

6.3÷6.3×93.7×10^-3

ANSWER:::::::::::::::>

1.067mol/kg