Turmeric as an Indicator

How does turmeric act as an Acid-Base Indicator?

Answer

• Indicators help us to identify if a substance is an acid or base .

• Turmeric is yellow in colour naturally .
• It changes colour when in a basic substance to red.
• So turmeric in ,
• Acid → Yellow
• Neutral → Yellow
• Base → Red
• This way turmeric can be used as an indicator.
• Example, 
• In Hydrochloric Acid (HCl), turmeric remains yellow
• In Sodium Hydroxide (NaOH), turmeric turns red