Indicators

Question 1

What re Indicators?

Answer 1

• These are substances which are one colour in acid & another colour in base.
• They are used to determine if a substance is acidic or alkaline

Question 2

Indicators and their Acid Colour & Base Colour

Answer 2

Indicator: Red Litmus
Colour in Acid: Red
Colour in Base/Alkali: Blue

Indicator: Blue Litmus
Colour in Acid: Red
Colour in Base/Alkali: Blue

Indicator: Phenophthalein
Colour in Acid: Colourless
Colour in Base/Alkali: Pink

Indicator: Methyl Orange
Colour in Acid: Red
Colour in Base/Alkali: Yellow