Answer :
Because based on atomic structure, in hydrogen chloride chlorine has more
tendency to gain electron of hydrogen and produce H+ and if hydrogens in phosphoric acid give their electrons to oxygens, there will be repulsion among non-joint electrons pair. Also that is why H3PO4 has acid ionization constant [tex] K_{a} = 7.25*10^{-3}[/tex] and HCl [tex]K_{a}=10^{3}[/tex].
I wish this be helpful for you.
tendency to gain electron of hydrogen and produce H+ and if hydrogens in phosphoric acid give their electrons to oxygens, there will be repulsion among non-joint electrons pair. Also that is why H3PO4 has acid ionization constant [tex] K_{a} = 7.25*10^{-3}[/tex] and HCl [tex]K_{a}=10^{3}[/tex].
I wish this be helpful for you.
