during the prepration of nitric acid at a temperature <200c the reactants are h2so4 and nano3 but at a temperature the reactants are nano3 and nahso4.though the products formed are same.why the same reactants are not used?

Asked by aditya.kumars | 11th Oct, 2016, 07:40: PM

Expert Answer:

Nitric acid is obtained by distilling conc. sulphuric acid with potassium KNO3 (nitre) or sodium nitrate at a temperature less than 200°C.


The temperature of the reaction should not exceed 200°C because sodium sulphate formed at a higher temperature forms a hard crust which sticks to the walls of the retort and is difficult to remove.

Answered by Vaibhav Chavan | 12th Oct, 2016, 08:45: AM

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