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Question
NaOH is a strong base. What will be the pH of 5 × 10−2 M NaOH solution? (log 2 = 0.3)
Options
14
13.70
13
12.70
MCQ
Solution
12.70
Explanation:
Given [OH−] = 5 × 10−2
∴ pOH = − log 5 × 10−2
= − log 5 + 2 log 10
= 1.30
pH = 14 − pOH
= 14 − 1.30
= 12.70
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