Chemistry
The following questions are pertaining to the laboratory preparation of hydrochloric acid.
(a) Name the reactants used during the laboratory preparation of hydrochloric acid.
(b) Give suitable reason for choosing the reactants for laboratory preparation.
(c) Write balanced chemical equation for the reaction taking place below 200°C.
Hydrogen Chloride
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Answer
(a) Sodium Chloride [NaCl] and Concentrated Sulphuric acid [H2SO4]
(b) Sodium chloride is preferred as it is cheap and easily available, whereas, conc. sulphuric acid is used as it is non-volatile and has a high boiling point hence it displaces the volatile HCl from the salt sodium chloride.
(c) NaCl + H2SO4 (conc.) NaHSO4 + HCl
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