Chemistry
The given set up in the figure is for the preparation of an acid
(a) Name the acid prepared by this method.
(b) Name the reactants used.
(c) Why an empty flask is used?
(d) What is the drying agent used? Why is this drying agent chosen
(e) What is the role of inverted funnel in the arrangement?
Answer
(a) Hydrochloric acid (HCl)
(b) The reactants used are sodium chloride and sulphuric acid.
(c) The empty flask acts as an Anti-Suction device. If back suction takes place then the water gets collected in it and will not reach the generating flask.
(d) The drying agent used is Concentrated Sulphuric acid. It is chosen as drying agent because it does not react with HCl.
(e) The role of the inverted funnel in the arrangement is -
- It prevents or minimizes back suction of water.
- It provides a large surface area for absorption of HCl gas.
Related Questions
State one appropriate observation when :
(a) Copper sulphide is treated with dilute hydrochloric acid.
(b) A few drops of dil. HCl are added to AgNO3 solution. followed by addition of NH4OH solution.
(c) Lead nitrate solution is mixed with dilute hydrochloric acid and heated.
(d) A small piece of zinc is added to dilute hydrochloric acid.
(e) Dilute HCl is added to sodium carbonate crystals.
(f) Concentrated HCl is added to manganese dioxide.
Distinguish by using HCl.
(a) Lead nitrate solution and silver nitrate solution.
(b) Potassium sulphite and potassium sulphide.
The following questions pertain to the laboratory preparation of hydrogen chloride gas:
(i) Write the equation for it's preparation mentioning the condition required.
(ii) Name the drying agent used in the above preparation and give a reason for the choice.
(iii) State a safety precaution taken during the preparation of hydrochloric acid.
How will you prove that Hydrochloric acid contains
(i) hydrogen
(ii) chlorine.
Write equations for the reactions.