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Acid-Base Indicators Quiz

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Questions and Answers

What color is methyl orange when it is in a solution that has a pH of 3.5?

Yellow

Orange

Pil (correct)

Red

What color is methyl red when it is in a solution that has a pH of 5?

Red

Yellow (correct)

Orange

Pink

What color is phenolphthalein when it is in a solution that has a pH of 8.5?

Colorless

Yellow

Orange

Pink (correct)

What color is thymolphthalein when it is in a solution that has a pH of 10.2?

Pink Signup and view all the answers

What color is bromthymol blue when it is in a solution that has a pH of 6.5?

Yellow Signup and view all the answers

What color is bromocresol green when it is in a solution that has a pH of 4?

Yellow Signup and view all the answers

What is the pH range of methyl orange indicator?

3.1 - 4.5 Signup and view all the answers

What is the pH range of methyl red indicator?

4.2 - 6.2 Signup and view all the answers

What is the pH range of phenolphthalein indicator?

8.3 - 10 Signup and view all the answers

What is the pH range of thymolphthalein indicator?

9.3 - 10.5 Signup and view all the answers

What is the pH range of bromthymol blue indicator?

6.0 - 7.5 Signup and view all the answers

What is the pH range of bromocresol green indicator?

3.8 - 4.6 Signup and view all the answers

What is the name of the indicator that changes color from colorless to pink?

Phenolphthalein Signup and view all the answers

What is the name of the indicator that changes color from yellow to blue?

Bromthymol blue Signup and view all the answers

Study Notes

pH Range and Color Change of Acid-Base Indicators

Methyl Orange:
- Color Change: Pink to Yellow
- pH Range: 3.1 - 4.5
Methyl Red:
- Color Change: Pink to Yellow
- pH Range: 4.2 - 6.2
Phenolphthalein:
- Color Change: Colourless to Pink
- pH Range: 8.3 - 10.0
Thymolphthalein:
- Color Change: Colourless to Pink
- pH Range: 9.3 - 10.5
Bromothymol Blue:
- Color Change: Orange to Blue
- pH Range: 6.0 - 7.5
Bromocresol Green:
- Color Change: Yellow to Blue
- pH Range: 3.8 - 4.6

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Description

Test your knowledge on the color changes and pH ranges of various acid-base indicators. Understand how each indicator functions within specific pH boundaries and learn their significance in chemistry. This quiz covers important details about Methyl Orange, Methyl Red, Phenolphthalein, and others.