From Atoms to Materials

13.4B  Comparing the properties of iron, sulphur and iron sulphide (Demo) Experiment m Caution •  Sulphur powder is irritant. Avoid direct contact with skin. •  Handle hot objects with care. Avoid direct contact with skin. •  Part B of this experiment should be done in a fume cupboard. Toxic sulphur dioxide gas may release when heating the mixture. •  Wash your hands thoroughly after the experiment. Materials and ap p a r a t u s iron powder 2 spatulas sulphur powder 3 spatulas irritant spatulas 2 white cardboards 2 (10 cm × 10 cm) bar magnet 1 glass rod 1 mineral wool some boiling tube 1 test tube holder 1 Bunsen burner 1 heatproof mat 1 gas lighter 1 Wear safety goggles. Wear gloves. iron powder sulphur powder Move a bar magnet slowly under each cardboard. Observe whether the magnet attracts the powder, and record the results. 2 Put 2 spatulas of iron powder on a white cardboard, and 3 spatulas of sulphur powder on another. Observe their colours. 1 A compound vs its constituent elements Does a compound have the same properties as its constituent elements? Let’s see a comparison now. Video Comparing the properties of iron, sulphur and iron sulphide magnet iron powder magnet sulphur powder Steps A. Properties of iron and sulphur 46 © United Prime Educational Publishing (HK) Limited 2024 All rights reserved; no part of this publication may be reproduced, photocopied, recorded or otherwise, without the prior written permission of the Publisher. Sample