The dissociation constant of weak acid is . In order to prepare a buffer solution with pH=5 [Salt]/[Acid] ratio should be
1:10
4:5
10:1
5:4
Value of Ka -
- wherein
At a given temperature T, Ka is a measure of the strength of the acid HX. Ka is dimensionless quantity.
Option 1)
1:10
Incorrect
Option 2)
4:5
Incorrect
Option 3)
10:1
Correct
Option 4)
5:4
Incorrect