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pH value of a solution , whose hydronium...

`pH` value of a solution , whose hydronium ion concentration is a `6.2 xx 10^(-9) mol//l` is

A

`6.21`

B

`7.21`

C

`7.75`

D

`8.21`

Text Solution

Verified by Experts

The correct Answer is:
D
`[H_(3)O^(+)] ` means `[H^(+)] = 6.2 xx10^(-9)` mol/L
`pH = - log (6.2 xx10^(-9)) = 8.21 `
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