How many moles of HCl must be added to 1.0 L of 1.0 M NH3(aq) to make a buffer with a pH of 9.00? (pKa of NH4+ = 9.25)
A) 0.36 mol
B) 0.44 mol
C) 0.56 mol
D) 0.64 mol
E) 1.8 mol
Correct Answer:
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