Question 38
Your teacher demonstrates this activity using 7 g of iron filings and 4 g of sulfur powder. Wear safety goggles. Heating is carried out by the teacher in a fume cupboard; do not touch the apparatus until it is completely cool. The teacher puts one to two scoops of the mixture in a test tube, plugs its mouth with mineral wool and heats until the mixture starts to glow, then turns off the burner. The cooled product has been compared with the starting iron and sulfur. What does this tell you about the properties of the substance in the test tube?
