CAIE A Level Chemistry 9701 · Group 2
Magnesium is reacted separately with steam and with dilute hydrochloric acid. In the reaction with steam, a white solid and a colourless gas are produced. In the reaction with dilute hydrochloric acid, a different colourless gas is produced.
Describe the observations for each reaction and write a balanced symbol equation for each reaction.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.