Advertisements
Advertisements
Question
How will you prepare hydrochloric acid in laboratory? OR
Describe briefly the method employed to dissolve hydrogen chloride gas in water as it is prepared. What is the purpose of funnel while preparing hydrochloric acid from HCI gas?
Advertisements
Solution
Hydrochloric acid cannot be prepared by mixing hydrochloride gas directly in water as it Ieads to back suctions.
A complete set up of apparatus for the preparation of hydrochloric acid in laboratory is shown in the given figure.
Hydrogen chloride gas prepared by the reaction of sodium chloride and sulphuric acid, is passed to inverted funnel arrangement through empty flask. An inverted funnel connected to the HCI gas supply is placed in a beaker in such a way that the rim of the funnel just touches the surface of water in the beaker. HCI gas coming through delivery tube fills the mouth of the funnel and then dissolves in water. By this way we get hydrochloric acid in the beaker.
OR
Hydrogen chloride gas is dissolved in water by inverted funnel arrangement. HCI gas cannot be dissolved in water directly as it Iead to back suction.
The purpose of funnel while preparing hydrochloric acid from HCI gas is :
1. To prevent back suction of water.
2. It provides a larger surface for dissolution of hydrogen chloride gas.
APPEARS IN
RELATED QUESTIONS
Explain, why (or give reasons for)
Hydrochloric acid cannot be concentrated above 22.2% by boiling.
Explain, why (or give reasons for)
Only a very dilute solution of hydrogen chloride in water can be concentrated by boiling the solution while a very concentrated solution would become less concentrated when boiled.
How can you prove that hydrochloric acid contain :
Hydrogen
Fill in the blank:
A constant boiling mixture of water and hydrochloric acid is also called as _______________.
Fill in the blank:
___________ agent converts hydrochloric acid to chlorine.
Fill in the blank:
The white precipitate of lead chloride is soluble in _________
Name the gas evolved when an oxide and concentrated hydrochloric acid are heated.
Write equation for the reaction between hydrochloric acid of the following: Oxide of lead
In the laboratory preparation of hydrochloric acid, HCl gas is dissolved in water.
- Draw a diagram to show the arrangement used for the absorption of HCl gas in water.
- State why such an arrangement is necessary? Give two reasons for the same.
- Write the chemical equation for the laboratory preparation of HCl gas when the reaction is:
- Below 200°C
- Above 200°C
State your observation when :
Dilute hydrochloric acid is added to copper carbonate.
