Praktikum Uji Larutan Asam Dan Basa Dengan Menggunakan Indikator Alami

Summary

This video demonstrates an experiment on testing acids and bases using natural indicators. The presenter explains the process of creating homemade indicators from natural ingredients like turmeric and purple cabbage. Through a series of steps, the experiment highlights how different substances, such as soap, shampoo, vinegar, and lime juice, react with these natural indicators, changing color based on their acidity or alkalinity. The video aims to educate viewers on how to identify the pH levels of common substances and emphasizes the importance of natural indicators in scientific experimentation.

Takeaways

• 😀 The purpose of the experiment is to create natural pH indicators and to test the acidity and alkalinity of different substances using these indicators.
• 😀 The materials required for the experiment include natural ingredients like turmeric, purple cabbage, and lime, as well as household items like soap, shampoo, and vinegar.
• 😀 The experiment begins with extracting juice from purple cabbage and turmeric, which will be used as the pH indicator solutions.
• 😀 The juice from purple cabbage is mixed with water and strained, while turmeric is also mixed with water to create its indicator solution.
• 😀 The next step involves preparing solutions with substances like lime juice, vinegar, soap, and shampoo in separate containers.
• 😀 After preparing the solutions, one spoon of each indicator extract (turmeric and purple cabbage) is added to each solution to observe the color changes.
• 😀 The experiment demonstrates how the color changes in the indicators can help identify whether a substance is acidic, neutral, or alkaline.
• 😀 When turmeric extract is added to shampoo, the solution turns light yellow, indicating a neutral pH.
• 😀 When turmeric extract is added to soap, it changes to orange-brown, indicating an alkaline pH.
• 😀 When turmeric extract is added to vinegar and lime juice, it turns yellowish, indicating an acidic pH.
• 😀 The second indicator, purple cabbage, shows similar results, turning blue with soap (alkaline), pinkish-purple with shampoo (neutral), and red with vinegar and lime juice (acidic).
• 😀 The video concludes with the message that natural indicators, like turmeric and purple cabbage, are useful for determining the pH of common substances, and the experiment helps understand the concept of acidity and alkalinity.

Q & A

What is the main objective of the experiment described in the video?

The main objective of the experiment is to create an acid-base indicator from natural ingredients and to test the acid-base properties of various substances using this natural indicator.

What materials are needed for the experiment?

The materials required include a pestle and mortar, a sieve, a plastic container, turmeric, a lemon, soap, shampoo, vinegar, and water.

Why is turmeric used in this experiment?

Turmeric is used as a natural pH indicator. When mixed with various substances, it changes color to indicate whether the substance is acidic, neutral, or basic.

What happens when turmeric is added to a shampoo solution?

When turmeric is added to shampoo, it changes to a bright yellow color, indicating that the shampoo solution is neutral.

What color change occurs when turmeric is added to soap solution?

When turmeric is added to a soap solution, it turns orange-brown, indicating that the soap solution is basic.

What does a yellow change in color indicate when turmeric is added to vinegar or lemon juice?

A yellow color change when turmeric is added to vinegar or lemon juice indicates that both substances are acidic.

Why does soap turn blue when tested with columbus extract?

Soap turns blue when tested with columbus extract because different brands of soap have different pH levels, and the specific soap used in the experiment has a pH that causes the color change to blue.

What happens when columbus extract is added to shampoo?

When columbus extract is added to shampoo, it turns a pinkish-purple color, suggesting that the shampoo is neutral.

What does the color red indicate when columbus extract is added to vinegar or lemon juice?

The red color indicates that both vinegar and lemon juice are acidic, as the columbus extract changes color to red when added to acidic solutions.

How is the pH of a substance determined in this experiment?

The pH of a substance is determined by observing the color change of the natural indicators (turmeric or columbus extract) when added to the substance. Different color changes correspond to acidic, basic, or neutral pH levels.