Acids and Bases Checkpoint

What are the properties of acids?

• Sour taste, ability to turn blue litmus paper red, and the ability to react with metals to produce hydrogen gas

• Sweet taste, ability to turn red litmus paper blue, and the ability to react with metals to produce oxygen gas

• Salty taste, ability to turn blue litmus paper red, and the ability to react with metals to produce carbon dioxide gas

• Bitter taste, ability to turn red litmus paper blue, and the ability to react with metals to produce hydrogen gas

Tags

SPS6

What are the properties of bases?

• No taste, dry feel, and turn blue litmus paper yellow

• Sweet taste, slimy texture, and turn red litmus paper green

• Sour taste, rough texture, and turn blue litmus paper red

• Bitter taste, slippery feel, and turn red litmus paper blue

Tags

SPS6

Explain the concept of pH scale.

• The pH scale measures the acidity or alkalinity of a substance.

• The pH scale measures the color of a substance.

• The pH scale measures the weight of a substance.

• The pH scale measures the temperature of a substance.

Tags

SPS6

What is the pH value of a neutral substance?

• 3

• 10

• 7

• 5

Tags

SPS6

What is the pH value of an acidic substance?

• More than 7

• Equal to 7

• Less than 7

• Negative

Tags

SPS6

What is the pH value of a basic substance?

• Greater than 7

• Less than 7

• Equal to 7

• Negative

Tags

SPS6

What are some common indicators used to test for acids/bases?

• Hydrogen peroxide, ammonia, and bleach

• Vinegar, baking soda, and lemon juice

• Salt, sugar, and water

• Litmus paper, phenolphthalein, and methyl orange

Tags

SPS6

How do indicators work in determining whether a substance is acidic or basic?

• By changing color in response to the pH of a substance

• By emitting a sound when in contact with a substance

• By measuring the temperature of a substance

• By releasing a pleasant smell when in contact with a substance

Tags

SPS6

Explain the role of litmus paper as an indicator for acids and bases.

• Litmus paper changes color in the presence of acidic or basic solutions.

• Litmus paper is used to measure temperature

• Litmus paper is used to test for the presence of metals

• Litmus paper is used to determine the density of a solution

Tags

SPS6

What does a base release when placed in water?

• hydroxide ions (OH-)

• hydrogen ions (H+)

• ions

• molecules

Tags

SPS6