What Is The pH Scale | Acids, Bases & Alkalis |...

What is the primary function of an indicator in chemistry?

• To measure the exact temperature of a solution.

• To determine if a substance is acidic, neutral, or alkaline.

• To increase the reaction rate of a chemical process.

• To purify a solution by removing impurities.

If you dip blue litmus paper into an acidic solution, what color will it turn?

• It will turn blue.

• It will turn red.

• It will turn purple.

• It will show no change.

On the pH scale, what range of values represents an acidic solution?

• pH 7 only

• pH 8-14

• pH 0-6

• pH 1-7

According to the video, which of these substances has a pH of approximately 2?

• Acid rain

• Milk

• Stomach acid

• Sea water

What is the main advantage of using a pH meter compared to universal indicators or litmus paper?

• It is less expensive to use.

• It provides more accurate pH measurements.

• It changes color more dramatically.

• It can be used with solid substances.