Chemistry - Acids and Bases - Indicators
Questions and Answers
Q1: Why there is a need for indicators to test acids and bases?
Answer: It would be too dangerous to taste a liquid to find out if it was acidic or basic. Chemists use substances or dyes called indicators which change colour or odour when they are added to acids or bases.
Q2: What is an indicator? Give examples of indicators.
Answer: An indicator is a dye or substance that changes colour or its smell when it is put into acid or a base. An indicator gives different colours in acid and base. Thus an indicator tells us if the given substance is an acid or base by changing its colour. The three common indicators are: Litmus, Methyl orange, phenolphthalein.
Q3: What are different types of indicators?