Calcium oxide CaO is used as drying agent in the preparation of Ammonia in laboratory- Can concentrated H2SO4 be used as drying agent instead of CaO- Justify your answer-

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard X

Chemistry

Reactions with Acids

Calcium oxide...

Question

Calcium oxide (CaO) is used as drying agent in the preparation of Ammonia in laboratory. Can concentrated H₂SO₄ be used as drying agent instead of CaO? Justify your answer.

Open in App

Solution

Sulphuric acid can not be used instead of CaO. it is because sulphuric acid reacts with ammonia and the salt ammonium sulphate is formed.
${NH}_{3} + H_{2} {SO}_{4} \to {({NH}_{3})}_{2} {SO}_{4} + H_{2} O$
Sulphuric acid is a strong oxidizing agent as well, apart from being a dehydrating agent. Where as CaO is not as such. It dehyrates without giving any artifects

$CaO + H_{2} O \to Ca {(OH)}_{2}$

Suggest Corrections

Similar questions

(a) Draw a labelled diagram for the laboratory preparation of hydrogen chloride gas.
(b) Give the balanced equation for the reaction.
(c) Name the drying agent used in drying hydrogen chloride gas.
(d) Phosphorus pentoxide and calcium oxide are good drying agents but they cannot be used to dry hydrogen chloride gas. Why?

Q. (i) How is ammonia gas prepared in laboratory starting from NH₄Cl? State the conditions and balanced equation for the preparation.
(ii) How is gas collected in a gas jar?
(iii) Name the substance used for drying ammonia gas. Why cannot substances such as conc. H₂SO₄, anhydrous calcium chloride and phosphorus pentoxide be used for drying ammonia gas?

Q. In the laboratory preparation of ammonia, a student used

H_{2} S O_{4}

for drying instead of CaO. What would be the repercussion of his action?

Name the drying agent used in the laboratory preparation of hydrogen chloride gas and justify your answer.

Q.  Why calcium oxide cannot be used as a drying agent in laboratory preparation of HCl?

Join BYJU'S Learning Program

Calcium oxide (CaO) is used as drying agent in the preparation of Ammonia in laboratory. Can concentrated H2SO4 be used as drying agent instead of CaO? Justify your answer.

Calcium oxide (CaO) is used as drying agent in the preparation of Ammonia in laboratory. Can concentrated H₂SO₄ be used as drying agent instead of CaO? Justify your answer.