Chemistry
Give reason —
In the lab. preparation of ammonia
- calcium hydroxide is used in excess.
- Flask is fitted in slanting position.
Ammonia
26 Likes
Answer
- In the lab preparation of ammonia, ammonium chloride is used. Ammonium chloride is sublime, during the reaction, the heat will cause ammonium chloride to vapourise. To prevent this, calcium hydroxide is used in excess. It absorbs excess heat and prevents the loss of ammonium chloride as vapours.
- The flask is fitted in slanting position so that the water formed in the reaction does not trickle back into the heated flask and thus break it.
Answered By
19 Likes
Related Questions
Give reason —
Ammonium nitrate is not used in the preparation of ammonia.
Give reason —
Conc. H2SO4 is a good drying agent, yet it is not used to dry NH3.
State the following conditions required in the Haber's process-
(a) Temperature
(b) Pressure
(c) Catalyst
Choose the correct word or phrase from the brackets to complete the following sentences and write balanced equations for the same.
(a) Ammonium chloride is a soluble salt prepared by …………… [precipitation, neutralization].
(b) When ammonium chloride is heated, it undergoes …………… [thermal decomposition/dissociation].
(c) Heating ammonium chloride with sodium hydroxide produces …………… [ammonia, nitrogen].