1.

How many hydrogen ions are present in `1ml` of a solution of `pH=13`?A. `6.02xx10^(13)`B. `6.02xx10^(12)`C. `6.02xx10^(7)`D. `6.02xx10^(5)`

Answer» Correct Answer - C
`pH=13`
` -log[H^(+)] =13`
or `[H^(+)]=10^(-13)"mole"//litre`
`[H^(+)]` in `1 ml=10^(-16) "moles"`
`1 "mole" H^(+)` contains `6.023xx10^(23)H^(+) ions`
`:.` No. of `H^(+) ions` in `10^(-16) "moles"`
`=6.023xx10^(23)xx10^(-16)=6.023xx10^(7)`


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