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Consider the titration of a 30.00 mL sample of 0.175 M CH3NH2 with 0.150 M HBr....

Consider the titration of a 30.00 mL sample of 0.175 M CH3NH2 with 0.150 M HBr. The volume of equivalence for the titration is 35.00 mL of HBr added. Kb = 4.4 x 10-4 (for CH3NH2 )

Determine: (remember to use two decimal places for pH values)

(a) the pH of the sample

(b) the pH at one-half of the equivalence volume

(c) the pH at the equivalence volume

(d) the pH when 40.00 mL of HBr has been added

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