Question

three liquids are given to you. One is acetic acid, another is sodium hydroxide and the third solution is sodium chloride. How will you identify them using china rose indicator?

Answer 1

Let :

• A = Acetic acid
• B = Sodium hydroxide
• C = Sodium chloride

Important point :

China rose indicator turns.

• Magenta - When solution is acidic
• Green - When solution is basic
• No change - When solution is neutral

Solution :

We will add each of liquid to china rise indicator and will look for colour change.

• As acetic acid is acid it will change colour to Magenta
• Sodium hydroxide being basic will change into green
• Sodium chloride is neutral and hence will show no color change.

Therefore by observing colour change we can identify solution.