Identifying Liquids Using Turmeric Indicator

Turmeric indicator is a natural pH indicator that changes color in the presence of acids and bases. By using this indicator, we can determine the nature of the given liquids, which include hydrochloric acid, sodium hydroxide, and a sugar solution. Here's how we can identify them using turmeric indicator:

**Materials Required:**
1. Turmeric powder
2. Water
3. Test tubes or glass containers
4. Pipettes or droppers

**Procedure:**

1. Prepare Turmeric Indicator Solution:
- Take a small amount of turmeric powder and add it to a beaker or glass.
- Pour some water into the beaker and mix it well until the turmeric powder is dissolved.
- The resulting yellow solution is the turmeric indicator.

2. Label the Test Tubes:
- Take three test tubes or glass containers and label them as A, B, and C.

3. Perform the Test:
- Pour a small amount of the first liquid (hydrochloric acid) into test tube A.
- Take a dropper or pipette and add a few drops of turmeric indicator solution to test tube A.
- Observe any color change in the mixture. If the solution turns reddish or pink, it indicates the presence of an acid. This confirms that the liquid in test tube A is hydrochloric acid.

- Repeat the same process for the second liquid (sodium hydroxide), pouring it into test tube B.
- Add a few drops of turmeric indicator solution to test tube B and observe any color change. If the solution turns dark yellow or brown, it indicates the presence of a base. This confirms that the liquid in test tube B is sodium hydroxide.

- Finally, pour the third liquid (sugar solution) into test tube C.
- Add a few drops of turmeric indicator solution to test tube C and observe any color change. If the solution remains yellow, it indicates a neutral solution. This confirms that the liquid in test tube C is a sugar solution.

**Explanation:**

- Turmeric contains a compound called curcumin, which acts as a natural pH indicator. It is yellow in acidic solutions and reddish or pinkish in basic solutions.
- When hydrochloric acid (a strong acid) is added to the turmeric indicator, it reacts and changes the color of the indicator to reddish or pinkish, indicating the presence of an acid.
- Sodium hydroxide (a strong base) reacts with the turmeric indicator, causing it to turn dark yellow or brown, indicating the presence of a base.
- The sugar solution, being a neutral substance, does not cause any significant color change in the turmeric indicator, thus remaining yellow.

By following this procedure, we can successfully identify the given liquids using only turmeric indicator. Remember to exercise caution while handling chemicals and always conduct experiments in a well-ventilated area.

Turmeric solution turns red in content with bases.it is not affected by acid and neutral substance