In the laboratory preparation and collection of hydrogen chloride, con

1.	In the laboratory preparation and collection of hydrogen chloride, concentrated sulphuric acid is used as twice- once before the gas is prepared. State the role of conc.suphuric acid in each case.
Answer» > (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+H 2 SO 4 →NaHSO 4 +HCl(g)

In the laboratory preparation and collection of hydrogen chloride, concentrated sulphuric acid is used as twice- once before the gas is prepared. State the role of conc.suphuric acid in each case.

Answer»

(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+H

→NaHSO

+HCl(g)

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In the laboratory preparation and collection of hydrogen chloride, concentrated sulphuric acid is used as twice- once before the gas is prepared. State the role of conc.suphuric acid in each case.

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