super hard pH question. HELP!!!?

Question

Aqueous Fe(NO3)3 is slightly acidic as shown by the following equilibrium:

Fe(H2O)6 +3 (aq) + H2O <=> Fe(H2O)5(OH)+2 (aq) + H3O+

If iron(II) has a similar nature in water, will a 1.0 M solution of iron(II) nitrate have a higher or lower pH than a 1.0 M solution of iron(III) nitrate? Defend your response.

Answer 1

Fe2+ ions are less hydrolysed than Fe3+ions, so the pH will be higher for Fe2+.
This is because they have a smaller charge and a larger radius.