1. Calculate pH of the following acid/base solutions

a) 0.1M HNO3 (nitric acid)

b) 0.03M Ba(OH)2 (barium hydroxide)

c) 0.09mol H2SO4 (sulfuric Acid) in 300ml solution

d) 0.8 g NaOH (Sodium hydroxide 40g/mol) in 400ml solution