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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 xx 10^(-9)` mol/l
`pH = -log (6.2 xx 10^(-9)) = 8.21`.
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