1.

The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by……

Answer»

`[H^+]=(K_a[ACID])/([sal t])`
`[H^+]=K_a[sal t]`
`[H^+]=K_a[acid]`
`[H^+]=(K_a[sal t])/([acid])`

Solution :ACCORDING to Henderson equation
`pH=pK_a+LOG""([sal t])/([acid])`
i.e., `-log[H^+]=-log K_a+log""([Sal t])/([acid])`
`-log[H^+]=log""([Sal t])/([acid]) times 1/K_a`
`-log""1/([H^+])=log""([Sal t])/([acid]) times 1/K_a`
`therefore[H^+]=K_a([sal t])/([acid])`


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