What is the [OH-] of a solution with a pH of 3.89? Group of answer choices

7.76 x 10^-11

2.11 x 10^-6

4.51 x 10^-10

1.29 x 10^-4

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answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.