pH Testing with Red Cabbage Juice

The video tutorial demonstrates an experiment using red cabbage juice to explore pH levels. By adding various substances like egg white, dish soap, and grape juice, viewers can observe color changes that indicate different pH levels. The experiment provides a visual representation of how different substances affect pH, offering a fun and educational way to learn about chemistry concepts.

What is the primary purpose of using red cabbage juice in this experiment?

• To cook a meal

• To test the pH levels of different substances

• To make a perfume

• To create a colorful display

What can the dark colors of the cabbage juice be used for, as mentioned in the video?

• Painting a picture

• Dyeing Easter eggs

• Making a smoothie

• Cleaning surfaces

Which of the following substances was NOT used in the test tubes?

• Soap

• Vinegar

• Grape juice

• Egg white

What is the purpose of using a graduated flask in the experiment?

• To mix the substances

• To store the substances

• To heat the substances

• To measure the volumes accurately

What is the role of dish soap in the experiment?

• To neutralize the acid

• To add fragrance

• To clean the test tubes

• To act as a high base

What color change indicates a pH level of around 7.5 to 7.9?

• Bright red

• Teal

• Dark purple

• Yellow

Which substance caused the cabbage juice to turn a more pink color?

• Grape juice

• Soap

• Egg white

• Baking soda

What is the pH level of the cabbage juice mixed with baking soda?

• Around 5

• Around 10

• Around 7

• Around 8

How can you use red cabbage juice to determine the pH of household items?

• By boiling them with cabbage

• By comparing their color change to a pH spectrum

• By mixing them with water

• By freezing them with cabbage juice

What does a more acidic solution do to the color of the cabbage juice?

• Turns it yellow

• Turns it pink

• Turns it green

• Turns it blue