#"A buffer equation contains appreciable quantities of a (i)................"# #"and its (ii) ..................?"#

1 Answer
Jun 16, 2017

Answer:

#(i)# #"A weak acid;"#........

Explanation:

..........and #(ii)# #"its conjugate base."#

See this old answer.

And thus we can write the so-called buffer equation............

#pH=pK_a+log_10{[[A^-]]/[[HA]]}#

And as we know, when #[A^-]=[HA]#, #pH=pK_a#. Do you agree?