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QNEET-2013-Ch-1549: NEET 2013 Chemistry - Class 11 NEET-2013-Ch-1549 Solution: The dissociation constant of weak acid is \(1 10^{-4}\). In…
The dissociation constant of weak acid is . In order to prepare a buffer solution with a pH = 5 the [Salt]/[Acid] ratio should be 4:5 10:1 5:4 1:10
Multiple Choice Options
- A 4:05
- B 10:01
- C 5:04
- D 1:10
Step-by-Step Verified Solution
Given, K a = 1 _ 10 �4
pK a = � log (1_ 10 �4 ) = 4
pH = pK a + log [ S a l t ] [ A c i d ]
_ 5 = 4 + log [ S a l t ] [ A c i d ]
_ log [ S a l t ] [ A c i d ] = 1
_ [ S a l t ] [ A c i d ] = 10 = 10 : 1