Study of Compounds – Hydrogen Chloride – Notes
Group 17: Chlorine – Hydrogen Chloride
Hydrogen chloride is prepared in the laboratory by treating sodium chloride with concentrated sulphuric acid.
+ ®420K +
Hydrogen chloride is a colourless gas with a pungent odour.
An aqueous solution of hydrogen chloride is also called hydrochloric acid.
Because of its ability to dissociate almost 100% to produce hydronium ions (H3O+ ), hydrochloric acid is considered a strong acid.
+ + ® H3O+ (aq) Hydrochloric acid + Cl– (aq) Ka = =107