--chemical reaction-->
EleE06 Iron reacts with sulfur in a similar way like with oxygen

Steel wool reacted with air after heating on the burner leaving a dark brittle substance called iron oxide.
* Left: Prepare a piece of gross steel wool to take 2 spatula of sulfur powder.
   Carefully heat it until the sulfur melts and the mixture starts glowing. Remove it from the fire
* Observatiuon: The mixture goes on glowing outside the flame. Right: Adark brittle substance is left after cooling.                       This substance synthesized from  iron and sulfur is called iron sulfide.

Distinguish between iron oxide and iron sulfide:
* Drip hydrochloric acid on the two samples, compare the smell of the two compounds:
Observatiuon: A smell of rotten eggs is observed only with the sample of iron oxide.
Explanations: The reactions of iron with O and with S resemble ach other. Both are called oxidation.
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