Acids and Bases

What is the pH value of a neutral solution like pure water?

• 0

• 7

• 14

• 1

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DOK Level 1: Recall

TEKS.SCI.8.6D

Which of the following is a property of acids?

• Bitter taste

• Slippery feel

• Sour taste

• Turns red litmus paper blue

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DOK Level 1: Recall

TEKS.SCI.8.6D

Which of the following is a property of bases?

• Sour taste

• Slippery feel

• Turns blue litmus paper red

• pH less than 7

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DOK Level 1: Recall

TEKS.SCI.8.6D

What color does blue litmus paper turn when it is dipped in an acidic solution?

• Blue

• Red

• Green

• Yellow

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DOK Level 1: Recall

TEKS.SCI.8.6D

Which of the following substances is likely to have a pH greater than 7?

• Lemon juice

• Vinegar

• Soap

• Coffee

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DOK Level 2: Skill/Concept

TEKS.SCI.8.6D

Compare the pH of acids and bases relative to water.

• Acids have a pH greater than 7, bases have a pH less than 7

• Acids have a pH less than 7, bases have a pH greater than 7

• Both acids and bases have a pH of 7

• Acids and bases both have a pH less than 7

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DOK Level 2: Skill/Concept

TEKS.SCI.8.6D

Which of the following is an example of an acid-base indicator?

• Salt

• Sugar

• Litmus paper

• Water

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DOK Level 1: Recall

TEKS.SCI.8.6D

Which of the following statements correctly compares acids and bases?

• Acids feel slippery, while bases taste sour.

• Acids turn red litmus paper blue, while bases turn blue litmus paper red.

• Acids have a sour taste, while bases have a bitter taste.

• Acids have a pH greater than 7, while bases have a pH less than 7.

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DOK Level 2: Skill/Concept

TEKS.SCI.8.6D

A solution has a pH of 3. What can you infer about this solution?

• It is a strong base.

• It is a weak base.

• It is a strong acid.

• It is a weak acid.

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DOK Level 2: Skill/Concept

TEKS.SCI.8.6D

Describe the role of pH in determining the strength of an acid or base.

• The lower the pH, the stronger the base; the higher the pH, the stronger the acid.

• The lower the pH, the stronger the acid; the higher the pH, the stronger the base.

• pH does not affect the strength of acids or bases.

• pH is only relevant for neutral solutions.

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DOK Level 3: Strategic Thinking

TEKS.SCI.8.6D