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What is the pH of 1.0xx10^(-5) molar ...

What is the pH of `1.0xx10^(-5)` molar solution of KOH ?

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`KOH_((aq)) impliesK_((aq))^(+) +OH_((aq))^(-)` One mole of KOH would give one mole of `OH^(-)` ions .
`[OH^(-)]=1xx10^(-5) mol "Litre"^(-1)`
`POH =- log _(10) [OH ^-]=-log _(10) [10^5]`
`=-(5xx log _(10) ^(10))=-(-5)=5 `
`pH +POH = 14 `
`pH = 14 -pOH =14-5=9`
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