Sdasd D.

asked • 04/27/21

The acid-dissociation constants of HC3H5O3 (aq) and CH3NH3+ (aq) are given in the table above. Which of the following mixtures is a buffer with a pH of approximately 10.5?

Given:

HC3H5O3--> Ka: 8.3*10^-4

CH3NH3+---> Ka: 2.3*10^-11

The acid-dissociation constants of HC3H5O(aq) and CH3NH3(aq) are given in the table above. Which of the following mixtures is a buffer with a pH of approximately 10.5?


  1. A mixture of 100. mL of 0.1 M CH3NH3Cl and 50. mL of 0.1 M NaOH


  1. A mixture of 100. mL of 0.1 M HC3H5O3 and 50. mL of 0.1 M NaOH


  1. A mixture of 100. mL of 0.1 M HC3H5Oand 100. mL of 0.1 M NaC3H5O3


  1. A mixture of 100. mL of 0.1 M NaC3H5O3 and 100. mL of 0.1 M NaOH


(I think it is the 3rd one not sure though)

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