1. | 2. | ||
Elements used: sulfur and iron filings | Heating the mixture | ||
3. | 4. | ||
The reaction begins | Rising sulfur vapor | ||
5. | 6. | ||
The sulfur vapor ignites | The reaction product is not magnetic |
Photo 1: | 5 g iron filings and 5 g sulfur are mixed in a test tube. |
Photo 2: | The mixture is heated using a Bunsen burner. |
Photo 3: | The reaction takes place quickly, as soon as the sulfur has melted.
Iron reacts with sulfur in a simple, exothermic reaction to produce iron
sulfide:
Fe + S ® FeS
|
Photo 4: | The heat produced vaporizes the sulfur. |
Photo 5: | Eventually the sulfur vapor ignites and burns with a light blue flame. |
Photo 6: | The residue that forms is not magnetic.
Iron sulfide reacts with hydrochloric acid to produce hydrogen sulfide and iron chloride: FeS + 2 HCl® FeCl2 + H2S |