Indicators

An indicator is a substance that changes WHAT when it reacts with an WHAT or WHAT and are usually WHAT themselves

An indicator is a substance that changes COLOUR when it reacts with an ACID or BASE and are usually WEAK ACID themselves

They exist in one of two conjugate forms that are WHAT and distinctly different in WHAT

They exist in one of two conjugate forms that are REVERSIBLE and distinctly different in COLOUR

Recall that to show the equivalence point of an acid-base titration, choose an indicator:

1. Whose COLOUR CHANGE RANGE includes the WHAT

2. That will react right after the WHAT reacts… this means the indicator is a weaker acid or base than the sample

Recall that to show the equivalence point of an acid-base titration, choose an indicator:

1. Whose COLOUR CHANGE RANGE includes the EQUIVALENCE POINT

2. That will react right after the SAMPLE reacts… this means the indicator is a weaker acid or base than the sample

None

None