CAIE A Level Chemistry 9701 · Chemistry of transition elements
When an excess of concentrated ammonia solution is added to an aqueous solution containing the hexaaquacopper(II) ion, , a ligand exchange reaction occurs and a deep blue solution is formed.
Describe the reaction, including the formula and geometry of the final complex ion formed, and the change in coordination number.
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.