From Atoms to Materials

Long Question 26. A student wants to extract copper from copper oxide. He builds the following set-up. copper oxide and carbon inside pipeclay triangle crucible (a) (i) Name this method. (ii) Write a word equation to describe this process. (iii) Is this method a physical change or a chemical change? Explain your answer. (b) When you do this experiment, what safety precaution should you take? State one. (c) State two environmental problems caused by this metal extraction. (d) Suggest another metal that can be extracted from its oxide by using this method. 118 Chapter Exercise © 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