Скачать или смотреть Y12 Non-metals. Lab preparation of Chlorine + Test and reaction with iron wool.

Carried out in a fume cupboard because of the highly poisonous nature of chlorine.
Concentrated hydrochloric acid should be added in a slow drop-wise fashion to a small amount of potassium permanganate solid.
Limited to recording time - I needed to carry out the reaction more speedily!
The reaction was slow to start, but became vigorous after a few minutes
2HCl + [O] = Cl2 + H2O
No need for the full equation. Just represent the potassium permanganate with the symbol [O]. This stands for any oxidising agent.
Chlorine, more than twice as dense as air, is collected by upward displacement of air.
Other relevant equations, referred to in the video, are:
Cl2(g) + H2O(l) = HCl(aq) + HOCl(aq)
2Fe(s) + 3Cl2(g) = 2FeCl3(s)

Frank Scullion
Production and Recording: Frank Scullion