Wardatul Bahiyyah | Perobaan Uji Asam Basa dengan Indikator Alami Kunyit

Summary

In this video, Wahyu Nur Badriah demonstrates an analytical chemistry practical experiment on testing acids and bases using natural turmeric extract as an indicator. The experiment involves testing substances like lemon juice, vinegar, soap water, and a synthetic solution with turmeric, observing color changes to identify their acidic or basic nature. The script explains the process of extracting turmeric juice, conducting the tests, and interpreting the results. The conclusion highlights the acidic nature of lemon juice and vinegar and the basic nature of soap water and the synthetic solution.

Takeaways

• 😀 The experiment focuses on testing the acidic and basic properties of various substances using natural turmeric extract as an indicator.
• 😀 The primary materials used in the experiment include clear glasses, a pipette, grater, knife, and substances like orange juice, vinegar, soap water, and Promark.
• 😀 Turmeric extract is created by peeling, washing, grating, and squeezing turmeric root to extract the juice, which serves as the natural pH indicator.
• 😀 The first solution tested is orange juice, which turns yellow when turmeric extract is added, indicating it is acidic.
• 😀 Vinegar, when mixed with turmeric extract, also turns yellow-orange, demonstrating its acidic nature.
• 😀 Soap water is tested next. When turmeric extract is added, the solution changes color from red to brown, indicating it is basic.
• 😀 Promark solution, when mixed with turmeric extract, changes from clear to brown, signifying it is basic as well.
• 😀 Acidic substances release hydrogen ions (H⁺) and have a pH below 7, while basic substances release hydroxide ions (OH⁻) and have a pH above 7.
• 😀 The turmeric extract serves as a natural indicator, changing color depending on the acidity or basicity of the substance it interacts with.
• 😀 The experiment successfully demonstrates the use of turmeric as a natural indicator to differentiate between acidic and basic substances.
• 😀 The presenter thanks the instructor, Ibu Ervin, for her guidance and apologizes for any mistakes in the experiment or explanation.

Q & A

What is the purpose of the experiment described in the transcript?

The purpose of the experiment is to test the properties of acidic and basic solutions using a natural indicator, turmeric, in a basic chemistry practical on acid-base testing.

What is the natural indicator used in the experiment?

The natural indicator used in the experiment is turmeric extract, which changes color in response to the acidity or basicity of a solution.

How is the turmeric extract prepared for the experiment?

To prepare the turmeric extract, the turmeric root is peeled, washed, grated, and then squeezed to extract the juice, which is used as the indicator.

What is the first substance tested in the experiment?

The first substance tested in the experiment is lemon juice. After adding the turmeric extract, it turns yellow, indicating that lemon juice is acidic.

What happens when turmeric extract is added to vinegar?

When turmeric extract is added to vinegar, the color changes from clear to yellow-orange, indicating that vinegar is acidic.

What is observed when turmeric extract is added to soap solution?

When turmeric extract is added to soap solution, the color changes from yellow to brown, indicating that soap solution is basic.

What happens when turmeric extract is added to Promark solution?

When turmeric extract is added to Promark solution, the color changes from clear to dark brown, indicating that Promark solution is basic.

What are the characteristics of an acidic substance?

Acidic substances typically have a sour taste, turn blue litmus paper red, are corrosive, and have a pH of less than 7.

What are the characteristics of a basic substance?

Basic substances usually have a bitter taste, turn red litmus paper blue, can neutralize acids, are caustic, and have a pH greater than 7.

What conclusion can be drawn from the experiment?

The experiment concludes that lemon juice and vinegar are acidic, while soap solution and Promark are basic, as indicated by the color changes in the turmeric extract.