20 mL of 0.08 mol L–1 HCl is mixed with 30 mL of 0.05 mol L–1 NaOH.
What is the pH of the resultant solution?
(A) 1.1
(B) 2.7
(C) 4.0
(D) 7.0
how do u do this please show working
also how do u do question 12 from the 2008 HSC paper
Samples of water were collected from a river at...