Unit 1 & 2 review 8.6ABCDE

Which of the following best describes the pH scale?

• A scale used to measure the toxicity of solutions.

• A scale used to measure the level of acids or bases in solutions.

• A scale used to measure the density of solutions.

• A scale used to measure the conductivity of solutions.

Which of the following would be considered a very weak acid?

• A solution with a pH of 3.

• A solution with a pH of 9.

• A solution with a pH of 11.5.

• A solution with a pH of 6.5.

Which of the following correctly describes the values on the pH scale?

• A pH of 0-6 represents an acid and a pH of 8-14 represents a base, with 7 being neutral.

• A pH of 0-6 represents a base and a pH of 8-14 represents an acid, with 7 being neutral.

• A pH of 0-6 represents an acid and a pH of 8-14 represents a base.

• A pH of 0-7 represents a base and a pH of 8-14 represents an acid.

How much stronger or weaker do acids or bases of solutions become as you move from one value to the next on the pH scale?

• 1 time

• 5 times

• 10 times

• 20 times

True or False: The lower the pH of a substance, the stronger of a base it represents.

• True

• False

A liquid with a pH of 7, like water, is considered ____________________.

• neutral

• acidic

• basic

• alkaline

A solution with a higher concentration of hydrogen ions (H+) and a pH less than 7 is known as a(n) ____________________.

• acid

• base

• neutral solution

• alkaline solution

A solution with a higher concentration of hydroxide ions (OH-) and a pH greater than 7 is known as a(n) ____________________.

• base

• acid

• neutral

• salt

Which substance would represent the pH 1 on scale below.

• Lemon juice

• Water

• Baking soda

• Bleach

Which substance would represent the pH 7 on scale below.

• Lemon juice

• Water

• Baking soda

• Bleach

Tags

NGSS.MS-PS1-2