Can iron replace magnesium from magnesium chloride?

In aqueous acidic solution definitely not. In a melt the log Kf crystal for FeCl2 is 50 for MgCl2 crystal is 104. It looks like it is very unlikely. read more

All Magnesium is not created equal mag chloride for the oil is good but I would never recommend Magnesium Citrate as it interferes with Ceruloplasmin and can cause iron dysregulation and other issues. read more

Magnesium reacts with iron(III) chloride to form magnesium chlorideand iron. 3Mg(s) + 2FeCl 3 (s) => 3MgCl 2 (s) +2Fe(s) A mixture of 82.0 g of magnesium (24.31 g/mol) and 350 g ofiron(III) chloride (162.2 g/mol) is allowed to react. read more