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40 mL of 0.1 M ammonia solution is mixed with 20 mL of 0.1 M HCl. What is the pH of the mixture? (pKb of ammonia solution is 4.74)

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40 mL of 0.1 M ammonia solution is mixed with 20 mL of 0.1 M HCl. What is the pH of the mixture? (pKb of ammonia solution is 4.74)

(a) 4.74

(b) 2.26

(c) 9.26

(d) 5.00

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Correct option  (c) 9.26

Explanation:

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