Water solubility of different types of Iron III For an experiment I require an aqueous solution of Iron(III). My school has the following compounds, which of them are water soluble? I believe that only Iron(III) oxide is insoluble, but I would like to verify.

Iron(III) oxide
Iron(III) oxalate
Iron(III) chloride-hexahydrate

Many thanks in advance.
Iron(III) oxide is insoluble.
Iron(III) oxalate is, in practical situations, insoluble.
Iron(III) chloride-hexahydrate is soluble.

Aditionally, Iron(III) oxalate is destroyed by visible light, and I intend to complete my experiment during the day, especially considering that involves colour changes.