Magnesium chloride
= Magnesium chloride
{title2=$\mathrm{MgCl_2}$}
<Magnesium chloride> is an <ionic compound> with two <chloride> <anions> per <magnesium> <cation>. Complete dissolution supplies one divalent magnesium ion and two monovalent chloride ions per formula unit. At analytical salt concentration $C$, these species contribute molar <ionic strength> $I=\tfrac12(4C+2C)=3C$, provided additional dissolved ions are absent.