1.

The pH of a buffer containing equal molar concentrations of a weak base and its chloride (K_(b)) forweak base =2xx10^(-5), log 2=0.3) is

Answer»

5
9
4.7
9.3

Solution :`pOH= - log K_(B)+log (["SALT"])/({"BASE"])`
`= - log K_(b)("SINCE" ("SALT")/("BASE")=1)`
`=- log 2xx10^(-5)=4.7`
`pH+pOH=14`
`THEREFORE pH=9.3`


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