From Atoms to Materials

High-order Thinking Question 27. Duncan uses the following set-up to separate crude oil into many fractions. thermometer water out water in long glass tube glass beads stopper ice cubes mineral wool soaked in crude oil pear-shaped flask heat condenser (a) Name this method. (b) State the purpose of the condenser and the ice. (c) Why is mineral wool used to soak up crude oil, instead of pouring crude oil directly into the flask? (d) Glass beads are used in the long glass tube. Vapour of hydrocarbons condenses and vaporizes repeatedly on the glass beads. What is the advantage of this setting? (Hint: Think about the shortcomings or potential hazards of the set-up in Experiment 13.6 .) 119 13 From Atoms to Materials 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