11 mark
The pH of a sample of acid rain at 25 C is 4.55.
What is the [OH-] in the sample?
9.45 M
3.55 x 10-10 M
2.82 x 10-5 M
1.0 x 10-14 M
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pH & pOH (College Board AP® Chemistry)
Exam Questions
15 mins6 questions21 mark
What is the pH of a solution of NaOH of concentration 0.001 M?
1
3
11
13
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31 mark
Which of the following statements is correct?
As temperature increases, the pH value of pure water decreases
As temperature decreases, the pH value of pure water decreases
The pH of water is unaffected by temperature
Pure water is not neutral
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41 mark
Two flasks contain two different acids labelled as HA and HB. A student measures the pH of each flask, and finds that they are pH 1 and pH 3 respectively.
Which of the following statements is true?
HA is a stronger acid than HB
HB is a stronger acid than HA
The [H3O+] in the solution of HB is 3 times greater than the [H3O+] in the solution of HA.
The [H3O+] in the solution of HA is 100 times greater than the [H3O+] in the solution of HB.
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51 mark
What is the correct comparison of hydrogen ions between a solution of pH 2 and a solution of pH 4?
Twice as large
Half as much
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