Acid-Base Indicator from Turmeric

Turmeric is not just a kitchen spice — it can also be used as a natural indicator to test acids and bases. This simple experiment is fun and helps students understand chemistry concepts easily.

In this article, we will explain how to make an acid-base indicator from turmeric, materials required, steps, and its working principle.

🧪 What is an Indicator?

An indicator is a substance that changes color to show whether a solution is acidic or basic.

👉 Turmeric is a natural indicator.

🧰 Materials Required

Turmeric powder

Water or alcohol

White paper or cloth

Soap solution

Lemon juice or vinegar

Small bowls

🛒 Amazon Affiliate Products (Use These)

Organic Turmeric Powder

White Chart Paper

Small Glass Bowls Set

Dropper Bottles

School Science Experiment Kit

🔧 Steps to Perform the Experiment

1️⃣ Mix turmeric powder with water to make a solution

2️⃣ Dip paper or cloth into it and let it dry

3️⃣ Cut it into strips (indicator paper)

4️⃣ Apply lemon juice on one strip

5️⃣ Apply soap solution on another strip

👉 Observe the color changes!

👁️ Observation

Turmeric remains yellow in acids (lemon/vinegar)

Turns reddish-brown in bases (soap solution)

👉 This shows the nature of substances.

💡 Working Principle

Turmeric contains a compound called curcumin.

In acidic medium → no color change

In basic medium → color changes to red/brown

👉 This property makes turmeric a natural indicator.

⚠️ Safety Tips

Avoid contact with eyes

Wash hands after experiment

Do not taste chemicals

Use clean materials

🎯 Benefits of This Project

✔ Very easy and low cost

✔ Uses household materials

✔ Clear understanding of acids and bases

✔ Perfect for school exhibitions

👉 Also read: pH Scale Testing at Home

👉 Check: Electrolysis of Water

🏁 Final Thoughts

The turmeric indicator experiment is a simple and fun way to learn about acids and bases using natural materials.

👉 It makes chemistry easy and interesting for students.

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