Chemistry
How will you prove that Hydrochloric acid contains
(i) hydrogen
(ii) chlorine.
Write equations for the reactions.
Hydrogen Chloride
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Answer
(i) Using an active metal below magnesium
Fe + 2HCl ⟶ FeCl2 + H2↑
(ii) Using an oxidising agent not containing lead.
MnO2 + 4HCl ⟶ MnCl2 + 2H2O + Cl2↑
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Related Questions
Draw a labelled diagram for the laboratory preparation of hydrogen chloride gas and answer the following.
(a) Name the acid used. Why is this particular acid preferred to other acids?
(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?
(e) Why is direct absorption of HCl gas in water not feasible?
(f) What arrangement is done to dissolve HCl gas in water.
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?
Give three distinct tests [apart from using an indicator] you would carry out with solution of HCl to illustrate the typical properties of an acid.
Convert:
(a) Two soluble metallic nitrates to insoluble metallic chlorides using dil. HCl.
(b) Insoluble iron(II) oxide to a soluble compound.
(c) Insoluble metal carbonate to a soluble chloride.
(d) Metal sulphide to an offensive smelling gas.