1.

The pK_(a) of a weak acid is 4.8. What should be the ratio of [Acid]/[Salt] of a buffer if pH = 5.8 is required

Answer»

10
0.1
1
2

Solution :`PH = pK_(a) + log.(["SALT"])/(["ACID"])`
`5.8 = 4.8 + log.(["Salt"])/(["Acid"])` or `log.(["Salt"])/(["Acid"]) = 1.0`
`(["Salt"])/(["Acid"]) = "antilog 1.0" = 10`
`:. (["Salt"])/(["Acid"]) = (1)/(10) = 0.1`.


Discussion

No Comment Found

Related InterviewSolutions