The aqueous $\mathrm{HNO}_{3}$ prepared by Ostwald's method is concentrated by distillation up to $6

Question

The aqueous $\mathrm{HNO}_{3}$ prepared by Ostwald's method is concentrated by distillation up to $68 \%$ by mass only. Further concentration up to $98 \%$ can be achieved by\

Professor PC Thomas Classes · Answer

dehydration with $\mathrm{H}_{2} \mathrm{SO}_{4}$\