Question

Find pH of 0.1 M NaOH solution.

• A. 1
• B. 2
• C. 13
• D. 17

Answer 1

Answer: (C)

13

Answer 2

pOH = - log [OH]
0.1 M NaOH give 0.1 M OH
pOH = - log 0.1 = 1
pH + pOH = 14
pH = 14 - pOH
pH = 14 - 1 = 13
pOH = 1 $\quad\quad\quad$ pH = 13