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Dec 27, 20221 min read

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


Question 11

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



 





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