Chemistry 104 Study Groups

BUFFERS & TITRATIONS PROBLEM
ANSWER
 

Exercise

  What ratio of concentrations of methylamine to methylamonium ion would be necessary to produce a solution that would buffer at pH of 9.9?

 

Answer

 

The ration of methylamine:methylamonium ion in a pH = 9.9 buffer is 0.18.

 

Explanation

 
  1. Examination of the expression for Kb reveals that the desired ratio can be obtained by manipulating the expression.
  2. Be sure that the correct ratio is calculated, the methylamine concentration must be in the numerator.


o Return to the Buffers and Titrations page