pH Chemistry Question

Question

Which of the following solutions can have a pH of 5?

a) a 10^-5 M solution of HCl

b) a 10^-5 M solution of NaOH

c) a 10^-5 M solution of NaCl

d) a 10^-5 M solution of CH₄

Answer 1

pH is the negative log of the [H+], so the only one that could have a pH = 5 would be

(a) 10^-5 M HCl