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Understanding the pH Scale

Authored by Afework Mekonnen

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12th Grade

Understanding the pH Scale
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the pH of a neutral solution at 25°C?

6

7

8

5

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is pH calculated from hydrogen ion concentration?

pH = log10[H+]

pH = 10^[H+]

pH = -log[H+]

pH = -log10[H+]

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the relationship between pH and pOH?

pH is a measure of acidity only

pH + pOH = 14

pH + pOH = 7

pH is the same as pOH

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a solution has a pH of 3, what is its hydrogen ion concentration?

0.01 M

0.1 M

0.001 M

0.0001 M

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-7 M?

6

8

10

7

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the pH scale indicate acidity or basicity?

A pH value of 7 indicates high acidity.

The pH scale measures temperature and pressure.

The pH scale ranges from 0 to 14, with 14 being neutral.

The pH scale indicates acidity with values below 7 and basicity with values above 7.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the pH of a solution that is 0.01 M in hydrochloric acid (HCl)?

1

3

4

2

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