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A 50.0mL sample of 0.0240 M NH3(aq) is titrated with aqueous HCl. What is the pH after the addition of 15.0mL of 0.0600 M HCl(aq) kb of NH3= 1.8x10^-5.
choices:
a) 878
b)9.73
c)8.86
d)9.25
e)9.38
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