How to calculate ph value of the solution? Two salt buffer.
solution contains:
c(Na3PO4) = 0,10 mol/L and c(Na2HPO4)=0,05 mol/L
Answer in my book is ph=12.96
solution contains:
c(Na3PO4) = 0,10 mol/L and c(Na2HPO4)=0,05 mol/L
Answer in my book is ph=12.96
1 Answer
Jan 31, 2017
You can do it like this:
Explanation:
Phosphoric acid has 3 ionisations. Here we are dealing with the 3rd:
For which:
You should be provided with this value in the question.
To find the pH we need the concentration of the
Rearranging gives: