CH 22 Acids, Bases, and pH Scale

Front

What is a buffer?

Back

A buffer is a solution that resists changes in pH when small amounts of acid or base are added. It helps maintain a stable pH in biological systems.

Front

What is the pH range of acids?

Back

Acids have a pH less than 7.

Front

What happens to blue litmus paper in the presence of an acid?

Back

Blue litmus paper turns red when it comes into contact with an acid.

Front

What is the pH scale range?

Back

The pH scale ranges from 0 to 14.

Front

What is the pH of pure water?

Back

The pH of pure water is 7, which is considered neutral.

Front

What is a base?

Back

A base is a substance with a pH greater than 7.

Front

What is homeostasis in terms of pH?

Back

Homeostasis refers to the ability of living organisms to maintain a stable internal environment, including a consistent pH level.

Front

What is the significance of the pH scale in biology?

Back

The pH scale is crucial in biology because it affects enzyme activity, metabolic processes, and overall cellular function.

Front

What is an alkaline solution?

Back

An alkaline solution is one that has a pH greater than 7.

Front

What is the role of water in buffering systems?

Back

Water acts as a solvent and can participate in chemical reactions that help maintain pH balance.