Iron, citric acid and their ions

This example depicts the relationship between the element Iron) and its diverse ions, Ferrous Ion and Ferric Ion.
It also shows Ferric Citrate, a combination of two ions - Citrate (a Citric Acid ion) and Ferric Iron, forming a tree structure with two roots. All other substances related to Iron or citric acid are omitted since they would not add to the value of the example.

Raw JSON Data

Iron

Ferrous Ion

Ferric Iron

Ferric citrate

Citrate

Citric Acid