acids and bases

Question 1

what is an indicator

Answer 1

a substance or mixture in which when added to a solution gives a different colour depending ion wheter it is an acidic, an alkaline or a neutral solution

Question 2

in red and blue litmus paper what are the different colour changes

Answer 2

red paper blue paper
in acid = red in acid = red
in alkali = blue in alkali = blue
in neutral = red in neutral = blue

Question 3

what are the different types of indicators?

Answer 3

• litmus paper
• universal indicator
• natural indicators (beetroot, cabbage)
• pH probe ( most efficient, up to 2 decimal places)