Ethanediote Ions in Compounds: Past Paper Question Analysis

Updated: Jul 23, 2023

P1 June 2017 Q11

Part of a series looking at past AQA A-level Chemistry questions with a focus on better performance in examinations.

If you haven't gone through the question/paper, click the direct link below, and have a go...

Question 11 is about compounds containing ethanedioate ions

A 14-mark question in 4-Parts

If you are struggling, it's a great idea to quickly draw a sketch to make the process clear - like the one below...

In this reaction, 6 x Fe–O bonds are broken and then the same number and type of bond is remade

The O-Fe-O bond angle is 90°

The molecule will show optical isomerism

The 3D representation is not required

There is a low concentration of ethanedioic acid in these foods