Acid-Base Indicators
Chemistry ⇒ Acids, Bases, and Salts
Acid-Base Indicators starts at 7 and continues till grade 12.
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See sample questions for grade 12
A solution is tested with litmus paper and shows no color change. What can you infer about the solution's pH?
A solution turns phenolphthalein pink but methyl orange yellow. Is the solution acidic, neutral, or basic?
A student adds a few drops of methyl orange to a solution and observes a yellow color. What can be inferred about the pH of the solution?
A student is titrating acetic acid with sodium hydroxide. Which indicator should be used and why?
Describe how you would prepare a natural indicator from red cabbage.
Describe the color change of bromothymol blue as the pH increases from acidic to basic.
Describe the color change of methyl orange in acidic and basic solutions.
Describe the mechanism by which acid-base indicators change color.
Explain the difference between endpoint and equivalence point in a titration.
Explain why phenolphthalein is not suitable for titrating a strong acid with a weak base.
Explain why the choice of indicator is important in acid-base titrations.
Explain why turmeric can be used as an acid-base indicator.
Explain why universal indicator shows a range of colors across the pH scale.
Name a natural acid-base indicator and describe its color change in acids and bases.
