(i) Name the acid used for the preparation of hydrogen chloride gas in the laboratory. Why is this particular acid preferred to other acids?
(ii) Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas.

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Solution

(i) Hydrogen chloride gas is prepared by treating Sodium chloride with concentrated sulphuric acid. The $H C l$ gas is passed through a drying agent to remove moisture where concentrated sulphuric acid plays the role of dehydrating agent as well.
(ii) $N a C l + H_{2} S O_{4} \to N a H S O_{4} + H C l (g)$

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Q. In the laboratory preparation of hydrochloric acid, hydrogen chloride gas is dissolved in water.
(iii) Write balanced chemical equations for the laboratory preparation of

H C l

gas when the reaction is :
A. Below

200^{\circ} C

B. Above

200^{\circ} C

(a) Draw a labelled diagram for the laboratory preparation of hydrogen chloride gas.
(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?

Which of the following acid is used with sodium chloride in the laboratory preparation of hydrogen chloride gas?

Q. For the preparation of hydrochloric acid in the laboratory.
(i) Why is the direct absorption of hydrogen chloride gas in water is not feasible?
(ii) What arrangement is done to dissolve hydrogen chloride gas in water?

Q. Name the drying agent used for laboratory preparing of hydrogen chloride gas.

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(i) Name the acid used for the preparation of hydrogen chloride gas in the laboratory. Why is this particular acid preferred to other acids?(ii) Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas.

(i) Hydrogen chloride gas is prepared by treating Sodium chloride with concentrated sulphuric acid. The HCl gas is passed through a drying agent to remove moisture where concentrated sulphuric acid plays the role of dehydrating agent as well.(ii) NaCl+H2SO4→NaHSO4+HCl(g)

(i) Name the acid used for the preparation of hydrogen chloride gas in the laboratory. Why is this particular acid preferred to other acids?
(ii) Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas.