with respect to the laboratory preparation of hydrogen chloride gas answer the questions that follow name the reactants used
Answers
Answer:
We produce Hydrogen Chloride in the laboratory by treating sodium chloride with concentrated sulphuric acid. We, then, heat this mixture up to 420K.
420K
NaCl + H2SO4 → NaHSO4 + HCl
We get Sodium bisulphate as a by-product which is insoluble. Therefore, we further mix it with more sodium chloride. This mixture has to be further warmed to a higher temperature of around 823K. It gives dissolvable sodium sulfate and HCl gas.
823K
NaHSO4 + NaCl → Na2SO4 + HCl
We dry this HCl by treating it with concentrated sulphuric acid. HCl is not dried over phosphorus pentoxide or brisk lime. This is because it reacts with both of these compounds.
hydrogen chloride
Hydrogen Chloride is a vapid gas. It has a very sharp and pungent odour.
It can melt to a colourless fluid at 189K. HCl forms a white solid at 159K upon freezing.
It is very soluble in water. An aqueous solution of Hydrogen Chloride is what we know as the hydrochloric acid.
Hydrochloric acid has a higher dissociation constant and is, therefore, a strong acid.
It reacts with metals and salts to give various chlorides. For example, it reacts with zinc to form zinc chloride.
Hydrochloric acid reacts with iron to form ferrous chloride.
Fe + 2HCl → FeCl2 + H2
Answer:
Small amounts of HCl gas for laboratory use can be generated in an HCl generator by dehydrating hydrochloric acid with either sulfuric acid or anhydrous calcium chloride. Alternatively, HCl can be generated by the reaction of sulfuric acid with sodium chloride: NaCl + H2SO4 → NaHSO4 + HCl.!