Question

On adding turmeric indicator to a colourless solution, no change in colour is observed. What is the nature of the solution? *​

Answer 1

Answer:

- PH of a substance is the measure of its acidic or alkaline medium, that has the range from 1-14 pH.

- Acidic medium have a range of pH about less than 7, and basic medium is found to have pH range higher than 7.

- When turmeric paper is dipped in acidic solution like vinegar or lemon juice then it doesn’t change its colour and remains yellow in colour.

- When turmeric is found to be soluble in basic solution, for example if it is dipped in basic solution like sodium hydroxide, then the turmeric turns red, this change in colour is due to the changes in pH .

That is the solution is basic in nature which changes the colour of turmeric from yellow to red .

Explanation:

mark brain

Answer 2

The nature of the solution is acidic or neutral.

• Turmeric is a natural indicator that changes colour in basic solutions. The yellow colour turns to orange or reddish-brown on reaction.
• While in an acidic solution or neutral solution, the colour remains unchanged, which is yellow.
• The compound curcumin is primarily responsible for the indicator property of turmeric.
• Acid-base indicators are defined as substances that change colour depending upon the pH of solution.