Chemical production of salmiac:
1. Which measures of precaution have to be taken when doing the following experiment?
Any chemical experiment hast to be carried out under high safety precautions in the chemistry lab.
When using acids and bases there is the danger of etching.
When using substances which are easily inflammable there is a high danger of fire.
Toxic and irritating substances must be dealt with care.
Certain chemical reactions are in the danger of exploding.
For your safety you should always wear protective glasses.
A plan in case of emergency should be set up.
The teacher should consider whether the learning effect and the use for the pupils is higher than possible side effects like the harm of health.
Security note when producing salmiac:
From the chemical point of view smoke can easily be produced with the help of hydrochloric acid and the vapour of ammonia.
However the production in big amounts is harmful to health. Only when the smoke is needed in little amounts it is justifiable to health.
2. Production of salmiac:
The reaction of the vapour of hydrochloric acid and the vapour of ammonia produces the fog of sal ammoniac.
(Only use very little amounts!)
Attention: Hydrochloric acid and the vapour of ammonia are toxic and etching and harmful to health.
To get rid of the substances prepare for a neutralization of SO4 and NH4.
Ammonium hydroxide and hydrochloric acid react to ammonium chloride and water:
NH4OH + NH4CL + H2O