Praktikum Indikator Alami Asam Basa (Bunga Telang-Kunyit) - Nasywa Nur Arsanda - SMA Negeri 9 Bogor

Summary

In this practical experiment, Ratna Indah from class 11 MIPA 2 demonstrates how to test acids and bases using natural indicators like turmeric and butterfly pea flower. The experiment involves preparing extracts of these indicators and testing them with various substances like vinegar, salt, and detergent. Turmeric turns yellow when exposed to acids and red with bases, while butterfly pea flower extract turns purple in acidic solutions and green in basic ones. The results show that vinegar is acidic, detergent is basic, and salt is neutral.

Takeaways

• 😀 The video demonstrates an acid-base test using natural indicators like turmeric and butterfly pea flowers.
• 😀 Natural acids taste sour (e.g., vinegar, citrus, tomatoes), while bases tend to be bitter and slippery (e.g., soap, detergent).
• 😀 Acid-base indicators help identify whether a solution is acidic or basic.
• 😀 There are several types of acid-base indicators, including natural, universal, atmospheric, and solution indicators.
• 😀 The natural indicators used in this experiment are turmeric and butterfly pea flowers.
• 😀 In the first experiment, turmeric extract was tested with vinegar, salt, and detergent.
• 😀 The turmeric indicator showed the following results: vinegar turned yellow, salt remained unchanged, and detergent turned red.
• 😀 In the second experiment, butterfly pea flower extract was tested with the same substances.
• 😀 The butterfly pea flower extract showed that vinegar turned purple, salt remained unchanged, and detergent turned green.
• 😀 The results demonstrate that vinegar is acidic (yellow with turmeric, purple with butterfly pea), detergent is basic (red with turmeric, green with butterfly pea), and salt is neutral (no color change in both experiments).
• 😀 The video concludes by emphasizing the effectiveness of turmeric and butterfly pea flower extracts as natural indicators for testing the acidity or basicity of a solution.

Q & A

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

The purpose of the experiment is to test the acidity and alkalinity of different solutions using natural indicators like turmeric and butterfly pea flowers.

What are the main types of substances tested in the experiment?

The substances tested in the experiment are vinegar, salt, and detergent.

What natural indicators are used in the experiment?

The natural indicators used are turmeric and butterfly pea flowers.

How does turmeric serve as an indicator in the experiment?

Turmeric is used to test the acidity or alkalinity of a solution. When turmeric-extracted paper is dipped into different solutions, it changes color based on whether the solution is acidic or alkaline.

What color does the turmeric indicator turn when exposed to vinegar, salt, and detergent?

When exposed to vinegar, the turmeric paper turns light yellow; when exposed to salt, there is no color change; and when exposed to detergent, it turns red.

What role does butterfly pea flower extract play in the experiment?

Butterfly pea flower extract is used as another natural indicator. It helps to determine whether a solution is acidic or alkaline, causing different color changes based on the substance.

What color changes occur with butterfly pea flower extract when exposed to vinegar, salt, and detergent?

When exposed to vinegar, the butterfly pea flower extract turns purple; with salt, there is no color change; and with detergent, it turns green.

How are the natural indicators prepared before the experiment?

For turmeric, it is crushed into a fine powder, then soaked in water to create an extract. For butterfly pea flowers, they are steeped in hot water to create an extract.

What is the significance of using both turmeric and butterfly pea flowers as indicators?

Using both turmeric and butterfly pea flowers allows for a more comprehensive test of acidity and alkalinity, as each indicator shows different color reactions to acidic and alkaline solutions.

What conclusion can be drawn from the experiment regarding the nature of the tested substances?

The experiment shows that vinegar is acidic (turning yellow with turmeric and purple with butterfly pea flowers), detergent is alkaline (turning red with turmeric and green with butterfly pea flowers), and salt is neutral (showing no color change with either indicator).