Question

Calculate the pH of buffer solution
containing 0.25 moles I litre of formic acid
(HCOOH) and 0.10 moles / litre of
Sodium formate (HCOONa). Ka for formic acid

is 1.8x10-4

​

Answer 1

Answer:

5.142

Explanation:

using Handersen equation

PH = pka + log[salt]/[acid]

= 3.745 + log(0.25/0.10)

= 3.745+1.397

= 5.142