Acid Bases & Indicators

Give an example of an indicator used to test for acids.

• Litmus paper

• Universal indicator

• Bromothymol blue

• Phenolphthalein

How does an indicator change color in the presence of an acid?

• Due to a change in pH level

• Through exposure to sunlight

• As a result of increased pressure

• Due to a change in temperature

What color does an indicator turn in the presence of a base?

• green

• red

• blue

• yellow

Explain how indicators help in distinguishing between acids and bases.

• Indicators help in distinguishing between acids and bases by changing color based on the pH of the solution they are added to.

• Indicators help in distinguishing between acids and bases by creating a magnetic field

• Indicators help in distinguishing between acids and bases by producing a foul odor

• Indicators help in distinguishing between acids and bases by emitting a distinct sound

Why is it important to use indicators when dealing with acids and bases?

• To increase the pH of the solution

• To determine acidity/basicity of a solution.

• To confuse the experimenter

• To add flavor to the solution

Describe the process of using an indicator to test for the presence of an acid.

• Add indicator to the substance being tested, observe color change

• Heat the substance and observe the reaction

• Shake vigorously and listen for a sound

• Mix with water and observe the fizzing

Can the same indicator be used to test for both acids and bases? Why or why not?

• Yes

• Sometimes

• It depends

• No

What are some common indicators used in chemistry experiments?

• Litmus paper, phenolphthalein, methyl orange, bromothymol blue, universal indicator

• colorimeter

• pipette

• pH paper

• titration paper

How do indicators contribute to our understanding of the properties of acids and bases?

• Indicators provide taste tests to determine if a substance is acidic or basic.

• By changing color in response to the presence of acids or bases, indicators help us visually identify the properties of substances as acidic or basic.

• Indicators release heat when in contact with acids or bases.

• Indicators contribute by emitting sounds when exposed to acids or bases.

A child got stung by a bee. Some of the Elders suggest to add Baking Soda or Lemon Juice. Which one do you think is Appropriate ?

• Lemon Juice

• Water

• Baking Soda

• None of the Above