iron(II) iodide
Be3(PO4)2--------------Beryllium phosphate
Turnbull's blue is ferrous ferricyanide, Fe3[Fe(CN)6]2
The compound Fe₃(PO₃)₂ is called iron(III) phosphite. In this name, "iron(III)" indicates that iron has a +3 oxidation state, and "phosphite" refers to the phosphite ion (PO₃³⁻). The formula reflects that there are three iron ions and two phosphite ions in the compound.
When Fe3+ and HCO3- combine, iron(III) bicarbonate or iron(III) hydrogen carbonate is formed. This compound is soluble in water and can undergo reactions that release carbon dioxide gas.
In the formula Fe2O3, the iron ion present is Fe3+. This means that each iron ion has a +3 charge, which balances with the -2 charge on each oxygen ion in the compound.
ferrous ions and Fe3+ is ferric ion
ferrous ions and Fe3+ is ferric ion
The name of the ionic compound Fe2+ is iron(II) or ferrous ion.
Be3(PO4)2--------------Beryllium phosphate
The presence of "iron" in a compound indicates that the cation in the compound is likely iron (Fe) in one of its various oxidation states. The specific oxidation state of iron can be determined by the compound's name or formula, such as Fe2+ (ferrous) or Fe3+ (ferric).
Fe3+ combines with PO43- ion to form FePO4 FePO4 is called ferric phosphate or iron(III) phosphate
Fe(SO4)3 is Iron(III) sulfate Wrong: Fe2(SO4)3 is iron(III) sulfate.
Turnbull's blue is ferrous ferricyanide, Fe3[Fe(CN)6]2
When Fe3+ and HCO3- combine, iron(III) bicarbonate or iron(III) hydrogen carbonate is formed. This compound is soluble in water and can undergo reactions that release carbon dioxide gas.
The chemical formula of ferrous phosphate is Fe3(PO4)2.
The chemical name is iron(III) sulfate. It is an ionic compound made up from the ions Fe3+ and SO4 2-. The three in brackets refer to the transition state of the iron cation.
FeSO₄ is Iron sulfate. It's a chemical known for centuries, and actually has had many names. Wikipedia lists: Ferrous sulfate; green vitriol; iron vitriol; copperas; melanterite; szomolnokite Note that the "oil of vitriol" was the name alchemists gave to sulfuric acid; when you dissolve iron into sulfuric acid, you get this salt. You can read more about it at http://en.wikipedia.org/wiki/Iron%28II%29_sulfate