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Consider the titration of a 28.0 −mL sample of 0.180 M CH3NH2 with 0.155 M HBr....

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Chemistry

Consider the titration of a 28.0 −mL sample of 0.180 M CH3NH2with 0.155 M HBr. Initial pH is 11.95.

Find:

a) the volume of added acid required to reach the equivalencepoint

b) the pH at 6.0 mL of added acid

c) the pH at one-half of the equivalence point

d) the pH at the equivalence point

e) the pH after adding 5.0 mL of acid beyond the equivalencepoint

Answer & Explanation Solved by verified expert
4.0 Ratings (415 Votes)
a The balanced chemical equation for the neutralization reaction is CH3NH2aq HBraq CH3NH3aq Braq 1 mol 1 mol 1 mol 1 mol moles of CH3NH2 initially taken MxV 0180 molL x 00280 L 000504 mol From the above neutralization reaction it is clear that equal mole of CH3NH2 and HBr react with    See Answer
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