from my knowledge(yeah im taking chem this year too),
concentration does not affect acidity of the acid.
you can have a very dilute HCl but the ph will still be 2.
vice versa you can have a strong ethanoic acid but the ph will
still be 5/6.
the part about water molecules im not too sure,
but pure water cannot be an electrolyte as it exists as simple
discrete molecules.
however with just one drop of acid/alkali,
the acid dissociates in the water when it dissolves and the
water molecules exists as ions(which can be used in
electrolysis)
correct me if im wrong, thanks! off to study Ss nao.
urmm see the link i posted in my earlier posts...