There are 48.72 g Fluorine ions
Further explanation
Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison so that the compound has a fixed composition of elements
In the same compound, although from different sources and formed by different processes, it will still have the same composition/comparison
%F in CaF₂ :
[tex]\tt \%F=\dfrac{2.Ar~F}{MW~CaF_2}\times 100\%\\\\\%F=\dfrac{2.19}{78}\times 100\5=48.72\%[/tex]
mass of Fluorine :
[tex]\tt 48.72\%\times 200=97.44~g[/tex]
So mass Fluorine ions(2 ions F in CaF₂⇒Ca²⁺+2F⁻) :
[tex]\tt =\dfrac{97.44}{2}=48.72~g[/tex]
