Which solution contains more acid, 50ml of a 0.20 N HCL solution or 50 ml of a 0.20 N acetic acid solution? Which has a higher hydronium ion concentration? Which has a lower pH?

Answer 1

moles acid = M x L = ??
Acetic acid is a weak acid (ionizes less than 100%) and HCl is a strong acid (ionizes 100%); therefore, the H3O^+ is stronger in the HCl.
The pH scale operates as follows:
<7 = acid.
7 = neutral
>7 = basic