Problem 32

Given information

The given pH of the buffer solution = 

Step-by-step explanation

We know that, 

Which indicate that the value of pKa for an acid should be equal to  for an effective buffer solution.

The pH of the buffer solution is given as 

So, the buffer solution should have the pKa value within the range of pH i.e.

(I) In the given buffer solution i.e. , the value of pKa is equal to which is not in the range of   of the given pH i.e. . So, this buffer solution cannot be used to create a buffer with pH = 

(II) In the given buffer solution i.e. , the value of pKa is equal to which is not in the range of   of the given pH i.e. . So, this buffer solution cannot be used to create a buffer with pH = 

(III) In the given buffer solution i.e. , the value of pKa is equal to   which is not in the range of   of the given pH i.e. . So, this buffer solution cannot be used to create a buffer with pH = 

Therefore, the buffer solution i.e. is the best buffer to create a buffer with pH = as the value of pKa is equal to  which is in the range of   of the given pH i.e. .