From Atoms to Materials

More to discuss Instead of using laboratory apparatus, how can we use daily items to break down water into hydrogen and oxygen? gas collected from an electrode glowing splint gas collected from positive electrode Collect a full test tube of gas at each electrode. Then switch off the power supply. 4 Test the gases with a burning splint and a glowing splint respectively, as shown below. Record your observations. 5 •  A compound is a pure substance made up of two or more elements chemically combined together. •  A compound may be broken down into its constituent elements. burning splint gas collected from the negative electrode Results 1. What do you observe at the electrodes? 2. Record the test results in the table below. Gas collected from … Tested with Observation negative electrode burning splint positive electrode glowing splint Analysis and conclusion When electricity is passed through water, the water is broken down into its constituent elements: (a) At the negative electrode, gas is collected. (b) At the positive electrode, gas is collected. 45 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