Iron(III) sulfate (or ferric sulfate), is the chemical compound with the formula Fe2(SO4)3, the sulfate of trivalent iron.

Some samples may also contain a sulfate group.

And it has three of these sulfate groups.

Kaatialaite (Fe(H2AsO4)3 5H2O) is a ferric arsenate mineral found in Finland.

All I did is replace the sulfate with an x.

And then finally, let's look at the sulfate group, that x.

Oxidation of hydrogen sulfide, sulfide, and elemental sulfur (S) to sulfate (SO42 ).

Osarizawaite is a greenish yellow sulfate mineral with the chemical formula PbCuAl2(SO4)2(OH)6.

But the key here to realize is that this group right here, this sulfate group, stays together.

Aluminium sulfate (Al2(SO4)3 (H2O)18) is produced on the annual scale of several billions of kilograms.

Magnesium sulfate (or magnesium sulphate) is an inorganic salt (chemical compound) containing magnesium, sulfur and oxygen, with the formula MgSO4.

Outside of red blood cells, good ferrous iron the only oxygen carrying form is oxidized uncontrollably to form the bad ferric and ugly ferryl forms of hemoglobin.

Sulfate aerosols have declined significantly since 1970 with the Clean Air Act in the United States and similar policies in Europe.

One of the most common alternative treatments is berberine sulfate (found in Oregon grape root, goldenseal, yellowroot, and various other plants).

Remember, there were some oxygens in this x group, but the sulfate group stayed together, so we can just treat those separately.

Aluminium ammonium sulfate, which is also called ammonium alum, (NH4)Al(SO4)2 12H2O, is used as a mordant and in leather tanning.

And if we want to write it back in terms of the sulfate terms, we can just un substitute the x, and we're

So if we rewrite this as I'll do it in a vibrant color iron oxide plus H2 there's only one sulfate group here x.

Where limestone has been used, such as at Cwm Rheidol in mid Wales, the positive impact has been much less than anticipated because of the creation of an insoluble calcium sulfate layer on the limestone chips, binding the material and preventing further neutralization.