Question

Consider the titration of a 24.0-mL sample of 0.175 M CH3NH2 with 0.150 M HBr. (The value of Kb for CH3NH2 is 4.4×10−4.)

Part A)Determine the

pH at 4.0 mL of added acid.

Part B)Determine the

pH at one-half of the equivalence point.

Part C)Determine the

pH at the equivalence point.

Part D) Determine the

pH after adding 6.0 mL of acid beyond the equivalence point.