Unit 2: Properties of Water Review

Front

What word describes when water is attracted to other substances?

Back

Adhesion: The tendency of water molecules to be attracted to other substances, allowing it to spread and wet surfaces.

Front

A substance with a pH less than 7 is called?

Back

Acid: A substance that increases the concentration of hydrogen ions (H+) in a solution.

Front

Why can small insects walk on the surface of calm water?

Back

Insects can walk on water because they are light enough not to break the hydrogen bonds between water molecules.

Front

What is the pH of a solution that is considered acidic?

Back

A solution with a pH less than 7 is considered acidic.

Front

What are the three types of mixtures?

Back

Solutions, colloids, and suspensions: These are the main categories of mixtures based on particle size and distribution.

Front

What is cohesion in relation to water?

Back

Cohesion: The attraction between water molecules, which causes them to stick together.

Front

What is surface tension?

Back

Surface tension: The elastic-like force existing at the surface of a liquid, caused by the attraction of water molecules.

Front

What is a base in terms of pH?

Back

Base: A substance with a pH greater than 7 that decreases the concentration of hydrogen ions in a solution.

Front

What is a neutral solution?

Back

Neutral: A solution with a pH of 7, indicating an equal concentration of hydrogen ions and hydroxide ions.

Front

What is capillary action?

Back

Capillary action: The ability of water to flow in narrow spaces without the assistance of external forces, due to adhesion and cohesion.