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Equilibrium
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11/10/2021 3:51 pm
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A solution contains 10 mL 0.1 N NaOH and 10 mL 0.05 N H2SO4, pH of this solution is:
(a) less than 7
(b) 7
(c) zero
(d) greater than 7
1 Answer
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11/10/2021 3:55 pm
Correct answer: (b) 7
Explanation:
Milli equivalents of NaOH = 10 × 0.1 = 1
Milli equivalents of H2SO4 = 10 × 0.05 = 0.5
2NaOH + H2SO4 → Na2SO4 + H2O
∴ 1 equivalent of NaOH reacts with 0.5 eq. of H2SO4 to give neutral (pH = 7) solution.