For ammonia, Kb is 1.8 × 10-5 . To make a buffered solution with pH 10.0, the ratio of NH4Cl to NH3 must be
A) 1.8 : 1.
B) 0.18 : 1.
C) 1 : 1.8.
D) 1 : 0.18.
E) none of these
Correct Answer:
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