10.5 Indicators and Table M

Indicators are substances that changes color when exposed to solutions with different pH values.

• True

• False

What is the color of litmus indicator in a solution with pH 3?

• blue

• red

What is the color of phenolphthalein in a solution with pH 12?

• colorless

• pink

What is the color of phenolphthalein in a solution with pH 6?

• colorless

• pink

What is the color of bromothymol blue in a solution with pH 5?

• yellow

• blue

What is the color of methyl orange in a solution with pH 5?

• yellow

• red

What is the color of methyl orange in a solution with pH 10?

• yellow

• red

What is the color of bromocresol green in a solution with pH 7?

• yellow

• blue

What is the color of thymol blue in a solution with pH 12?

• yellow

• blue

What is the color of litmus in a solution with pH 9?

• yellow

• blue