CAIE A Level Chemistry 9701 · Group 2
A student adds an excess of strontium carbonate, , to of dilute hydrochloric acid, , in a beaker. The mixture fizzes, and after the reaction is complete a clear solution remains.
Describe what the student would observe, and write a balanced symbol equation for the reaction that occurs.
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.