Understanding pH Indicators

Understanding pH Indicators

Assessment

Interactive Video

Chemistry

6th - 8th Grade

Practice Problem

Hard

Created by

Nancy Jackson

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary function of pH indicators?

To increase the acidity of a solution

To measure temperature changes

To change color based on hydrogen ion concentration

To neutralize a solution

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when blue litmus paper is placed in an acidic solution?

It dissolves

It turns blue

It turns red

It remains unchanged

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which color does phenolphthalein turn in a basic solution?

Yellow

Clear

Pink to purple

Red

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the key ingredient in red cabbage that acts as a pH indicator?

Carotene

Tannin

Chlorophyll

Anthocyanin

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you make a red cabbage pH indicator at home?

Boil red cabbage in water for 20 minutes

Freeze red cabbage and then thaw it

Mix red cabbage with vinegar

Grind red cabbage into a powder

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What pH level is indicated by a red cabbage solution turning pink?

Around 7

Around 2

Around 9

Around 14

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the approximate pH of lemon juice as determined by the red cabbage indicator?

5

10

7

2

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