PRAKTIKUM ASAM BASA

Summary

In this video, the presenter demonstrates an acid-base experiment using various liquids to identify their pH levels and categorize them as either acidic, basic, or neutral. The test involves using litmus paper and universal indicators to observe reactions with substances like soda, orange juice, vinegar, lime water, soap water, distilled water, and saltwater. The video clearly showcases how different substances affect the pH, with results ranging from highly acidic (e.g., vinegar with pH 1) to basic (e.g., soap water with pH 12) and neutral (e.g., distilled water with pH 7), providing viewers with a practical understanding of acid-base properties.

Takeaways

• 😀 The video demonstrates an acid-base practical experiment.
• 😀 Litmus paper is used to test the acidity or basicity of various solutions.
• 😀 Red litmus paper stays red in acidic solutions and turns blue in basic solutions.
• 😀 Blue litmus paper turns red in acidic solutions and remains blue in basic solutions.
• 😀 The pH of soda was tested and found to be 4, indicating it is acidic.
• 😀 The pH of orange juice was tested and found to be 3, showing it is acidic.
• 😀 Vinegar also showed a red color change in blue litmus paper, with a pH of 1, indicating strong acidity.
• 😀 Lime water (air kapur) caused a slight change in red litmus paper and stayed blue in blue litmus, showing it is basic with a pH of 8.
• 😀 Soap water caused red litmus to turn blue and had a pH of 12, confirming its basic nature.
• 😀 Distilled water showed no change in litmus paper and had a neutral pH of 7.
• 😀 Salt water was tested, and no color change occurred in the litmus paper, with a neutral pH of 7.

Q & A

What is the main objective of this experiment?

The main objective of the experiment is to demonstrate how different solutions react with litmus paper and universal indicator, showing whether they are acidic, neutral, or basic.

What happens when red litmus paper is placed in soda?

The red litmus paper stays red, indicating the solution is acidic.

What is the significance of blue litmus paper turning red in the soda?

The change in color of blue litmus paper from blue to red indicates that the solution is acidic.

What does the universal indicator show when added to soda?

The universal indicator shows that the pH of soda is 4, confirming that soda is acidic.

What happens to the litmus papers when they are placed in orange juice?

The red litmus paper stays red, while the blue litmus paper turns red, indicating that orange juice is acidic.

What is the pH level of orange juice according to the experiment?

The pH of orange juice is 3, which confirms it is acidic.

What is observed when litmus paper is placed in vinegar?

In vinegar, the red litmus paper stays red, and the blue litmus paper turns red, indicating that vinegar is acidic.

What is the pH of vinegar in this experiment?

The pH of vinegar is 1, confirming that vinegar is strongly acidic.

How do the litmus papers react when placed in limewater (calcium hydroxide solution)?

The red litmus paper turns slightly blue, while the blue litmus paper stays blue, indicating that limewater is basic.

What does the universal indicator show when added to limewater?

The universal indicator shows that the pH of limewater is 8, confirming it is basic.

What are the reactions when litmus papers are placed in soap water?

The red litmus paper turns blue, and the blue litmus paper stays blue, indicating that soap water is basic.

What is the pH level of soap water as shown by the universal indicator?

The pH of soap water is 12, confirming that soap water is strongly basic.

What happens when litmus paper is placed in distilled water?

Neither the red nor the blue litmus paper changes color, indicating that distilled water is neutral.

What is the pH level of distilled water according to the universal indicator?

The pH of distilled water is 7, confirming that it is neutral.

What happens when litmus paper is placed in saltwater?

The red and blue litmus papers do not change color, indicating that saltwater is neutral.

What is the pH of saltwater as per the experiment?

The pH of saltwater is 7, confirming that it is neutral.