Litmus Test SciShow Experiments

The video explains the concept of a litmus test, both in everyday language and scientific terms. It describes pH as a measure of acidity or alkalinity, determined by the concentration of protons in a solution. The video provides a DIY method to create a litmus test using purple cabbage, which contains anthocyanin, a pigment that changes color based on pH levels. This experiment allows viewers to test the acidity or basicity of various solutions at home. The video concludes by highlighting the practical applications of this experiment.

What does a litmus test determine in a scientific context?

• The density of a material

• The color of a solution

• The pH level of a substance

• The temperature of a liquid

What is the ideal pH level for a neutral solution?

• pH 5

• pH 3

• pH 9

• pH 7

What household item can be used to create a homemade litmus test?

• Green spinach

• Red apples

• Purple cabbage

• Yellow bananas

What color does the cabbage juice turn in a basic solution?

• Red

• Blue

• Greenish-yellow

• Purple

What pigment in purple cabbage acts as a pH indicator?

• Xanthophyll

• Anthocyanin

• Carotene

• Chlorophyll