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Question
Determine the ammonia concentration of an aqueous solution that has a pH of 11.50. The equation for the dissociation of NH3(Kb= 1.8 10-5) is
NH3(aq) + H2O(l) 
NH4+(aq) + OH-(aq).
A) 2.5 M
B) 0.55 M
C) 5.7 10-3M
D) 3.2 10-3M
Answer
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