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?

    <p>Pink</p> Signup and view all the answers

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

    <p>Yellow</p> Signup and view all the answers

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

    <p>Yellow</p> Signup and view all the answers

    What is the pH range of methyl orange indicator?

    <p>3.1 - 4.5</p> Signup and view all the answers

    What is the pH range of methyl red indicator?

    <p>4.2 - 6.2</p> Signup and view all the answers

    What is the pH range of phenolphthalein indicator?

    <p>8.3 - 10</p> Signup and view all the answers

    What is the pH range of thymolphthalein indicator?

    <p>9.3 - 10.5</p> Signup and view all the answers

    What is the pH range of bromthymol blue indicator?

    <p>6.0 - 7.5</p> Signup and view all the answers

    What is the pH range of bromocresol green indicator?

    <p>3.8 - 4.6</p> Signup and view all the answers

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

    <p>Phenolphthalein</p> Signup and view all the answers

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

    <p>Bromthymol blue</p> 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.

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