DOL REC: pH and pOH Calculations

Which of the following statements correctly describe the pH scale (0–14)?

• The pH scale measures acidity and alkalinity, ranging from 0 (acidic) to 14 (alkaline), with 7 being neutral.
• The pH scale is logarithmic, with 0 being neutral and 14 being highly acidic.
• The pH scale measures only the strength of acids, not bases, from 0 to 14.
• The pH scale ranges from 1 (alkaline) to 15 (acidic), with 8 being neutral.

A student is given the pH of a solution and asked to find [OH⁻]. Describe the steps they should take to solve this problem.

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Which of the following is the correct formula to calculate pH?

• pH = -log10[H+]
• pH = log10[H+]
• pH = -log[H+]
• pH = 7 - log[H+]

What is the pH of a solution with a hydrogen ion concentration of 6.2 x 10-5?

• 5

• 4.2

• 1.6

• 10.9

What is the pOH of a solution that has a pH of 2?

• 10
• 12
• 14
• 1