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Ammonia and the Ammonium Ion Form a Conjugate Acid-Base Pair

Question 39

Multiple Choice

Ammonia and the ammonium ion form a conjugate acid-base pair.
NH3(aq) + H2O(l) Ammonia and the ammonium ion form a conjugate acid-base pair. NH<sub>3</sub>(aq) + H<sub>2</sub>O(l) NH<sub>4</sub><sup>+</sup>(aq) + OH<sup>-</sup>(aq) Calculate the pH of 0.10 M NH<sub>3</sub> if K<sub>a</sub> for the NH<sub>4</sub><sup>+</sup> ion is 5.6 x 10<sup>-10</sup>. A) 4.7 B) 5.1 C) 5.7 D) 8.9 E) 11.1 NH4+(aq) + OH-(aq)
Calculate the pH of 0.10 M NH3 if Ka for the NH4+ ion is 5.6 x 10-10.


A) 4.7
B) 5.1
C) 5.7
D) 8.9
E) 11.1

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