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The pH of solution A is 3. It is mixed w...

The pH of solution A is 3. It is mixed with an equal volume of another solution B having pH 2. What is the resultant pH of the solution?

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The correct Answer is:
A
For solution `A, pH = 3 implies [H ^(+)] = 10 ^(-3) M and ` for solution `B, pH = 2 implies [ H ^(+)] = 10 ^(-2) M.`
For the resultant solution, `[H ^(+)] = (10 ^(-3) M + 10 ^(-2) M )/( 2) = 5.5 xx 10 ^(-3)`
`pH =- log [ H ^(+)] =- log [5.5 xx10 ^(-3)] = 2.26`
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