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Consider the titration of 100ml of .100M H2NNH2 (Kb=3.0*10^-6) by .200 M HNO3. Calculate the pH of the resulting solution after the following volumes of HNO3 have been added:
a. 0.0ml
b. 20ml
c. 25ml
d. 40 ml
e. 50ml
f. 100ml
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