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# The pH and pOH scales - PowerPoint PPT Presentation

The pH and pOH scales. pH scale. Measures the amount of H + in a solution. Scale used to measure whether a substance is an acid or a base. Lower numbers are acids. Higher numbers are bases. Examples. Which of the following pH values represents the strongest acid? A) 12.0 B) 9.0

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## PowerPoint Slideshow about ' The pH and pOH scales' - avongara-kuron

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### The pH and pOH scales

• Measures the amount of H+ in a solution.

• Scale used to measure whether a substance is an acid or a base.

• Lower numbers are acids.

• Higher numbers are bases

• Which of the following pH values represents the strongest acid?

A) 12.0

B) 9.0

C) 2.0

D) 7.0

• Which of the following pH values represents the weakest base?

A) 12.0

B) 9.0

C) 2.0

D) 7.0

• Measures the amount of OH- in a solution.

• The pH and pOH scales are related by the following equation.

pH + pOH = 14

• Ex: What is the pOH of a solution if its pH is 4?

Is it an acid, base, or neutral?

• Ex: What is the pH of a solution if the pOH is 9?

Is it an acid, base, or neutral?