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 8
A colorless solution turns pink when phenolphthalein is added. What does this indicate?
A solution does not change the color of either red or blue litmus paper. What can you conclude about the solution?
A solution turns yellow when methyl orange is added. Is the solution acidic or basic?
A student adds a few drops of methyl orange to a solution and observes a red color. What does this indicate about the solution?
A student adds blue litmus paper to a solution and it turns red. What does this indicate about the solution?
A student uses turmeric paper to test a solution and observes no color change. What can be inferred about the solution?
Describe how turmeric can be used as an acid-base indicator.
Describe what happens when red cabbage juice is added to a basic solution.
Explain why it is important to use the correct indicator for a particular titration.
Explain why turmeric is not suitable for detecting acids.
Explain why universal indicator is more useful than litmus paper for measuring pH.
Name two natural indicators other than litmus.
What color does phenolphthalein show in an acidic solution?
What color does red litmus paper turn in a basic solution?
What is an acid-base indicator?
What is the main difference between a natural and a synthetic indicator?
What is the main use of acid-base indicators in chemistry?
