How Can 68% Nitric Acid Be Concentrated to 98% Nitric Acid?

How can 68% nitric acid be concentrated to 98% nitric acid?

One Line Answer

98% nitric acid is obtained by distilling 68% nitric acid with conc. H₂SO₄ under reduced pressure. The function of H₂SO₄ is to absorb water.

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Laboratory Preparation of Nitric Acid

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Chapter 10: Study of Compounds: Nitric Acid - Exercises [Page 229]

Chapter 10 Study of Compounds: Nitric Acid
Exercises | Q 15. (b) | Page 229

Name the gas evolved when the following mixtures are heated.

Sodium nitrite and ammonium chloride.

Name the products formed when dilute HNO₃ is added to copper.

Ammonia is used in the Ostwald process.

Name the catalyst used in the process.

Name the Following:
Salt referred to as chile saltpeter.

Explain with the help of a balanced equation, the brown ring test for nitric acid.

Choose the correct answer from the option given below:
The catalyst used in the manufacture of HNO₃ by Ostwald process is

Fill in the blank with appropriate word/words.
98% nitric acid is obtained by distilling 68% nitric acid with ________ under ______

Name (formula is not acceptable) the gas produced in the following reaction:
By the action of concentrated nitric acid on copper.

What is the special feature of the apparatus that is used in the laboratory preparation of nitric acid?

Lead nitrate decomposes on heating to give ______.