1.

The pH of a buffer solution containing ratio of concentration of salt of weak acid and weak acid equal to 2 is (pK_(a)=4.75, log 2 = 0.3010) :

Answer»

`4.45`
`5.05`
`1.425`
`13.699`

SOLUTION :`pH=pK_(a)+"LOG"(["SALT"])/(["ACID"])`
or `pH=4.75+0.3010=5.05`


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