Calculate the pH of the following aqueous solutions at 298K:
(a) potassium hydroxide 0.406 mol dm-3 (3 marks)
(b) nitric acid 0.0045 mol dm-3 (2 marks)
(c) sulfuric acid 0.06 mol dm-3 (3 marks)
(d) barium hydroxide 0.002 mol dm-3 (3 marks)
Kw(298) = 1.00 x 10-14 mol2 dm-6
I get
a) 13.61
b) 11.64
c) 0.92
d) 11.60
are the wrong my answers