Answer to Question #120517 in Inorganic Chemistry for Aartee

Question #120517
In an experiment, 13.88 g of potassium propionate, C2H5CO2K, were weighed in a beaker and
dissolved in a small amount of distilled water. The mixture is transferred to a 100 mL volumetric
flask, made up to the mark and shaken well. 50.0 mL of this standard solution is mixed with 50.0
mL of a standard solution of propionic acid, C2H5CO2H in order to prepare a buffer solution of
pH 5.66. The molar mass of potassium propionate is 112 g mol-1
and the pKa of propionic acid is
4.87.
(i) What is the concentration of the propionic acid used to make the buffer?
1
Expert's answer
2020-06-08T15:31:09-0400

Concentration of in ml

Now ml of this solution is taken and then mixed with equal amount of propionic acid say

So,total volume of buffer solution will be .

Concentration of or Lets say

Now ,for buffer solution,

and



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