From Atoms to Materials

Caution DO NOT move the magnet too close to the mouth of the boiling tube. reaction product spatula white cardboard iron powder + sulphur powder magnet When the mixture starts to glow, turn off the Bunsen burner immediately, and allow the set-up to cool down. 2 Using a spatula, transfer the reaction product on a white cardboard. Observe its colour. 3 Move a bar magnet slowly under the cardboard. Observe whether the reaction product is attracted by the magnet. Record the results. 4 Insert some mineral wool into the mouth of the boiling tube in part A . Heat the mixture with a regular Bunsen flame in the fume cupboard. 1 Using a spatula, transfer the iron powder and sulphur powder to the same boiling tube. Stir well with a glass rod. Observe the colour of the mixture. 3 Put a bar magnet near the bottom of the boiling tube, and slowly move it upwards. Record what you observe. Keep the mixture for use in part B . 4 A regular flame is also known as a blue flame. Lab technique The mineral wool prevents sulphur vapour from escaping and catching fire. mixture in part A Bunsen burner mineral wool B. Properties of iron sulphide Results Substance Colour Attracted by magnet? (yes/no) iron powder sulphur powder iron/sulphur mixture reaction product (i.e. iron sulphide) 47 13 From Atoms to Materials © 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