Question

NaOH is a strong base. What will be the pH of 5 × 10⁻² M NaOH solution? (log 2 = 0.3)

विकल्प

• 14

• 13.70

• 13

• 12.70

Answer 1

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