PH: (New ) Chapter 3 Test

Front

What is the definition of pH?

Back

pH is a measure of the acidity or basicity of a solution, defined as the negative logarithm of the hydrogen ion concentration.

Front

What is the pH scale range?

Back

The pH scale ranges from 0 to 14, where 0-6 is acidic, 7 is neutral, and 8-14 is basic.

Front

What is an acid?

Back

An acid is a substance that donates hydrogen ions (H+) in a solution, resulting in a pH less than 7.

Front

What is a base?

Back

A base is a substance that accepts hydrogen ions (H+) or donates hydroxide ions (OH-) in a solution, resulting in a pH greater than 7.

Front

What is a neutral solution?

Back

A neutral solution has a pH of 7, indicating an equal concentration of hydrogen ions and hydroxide ions.

Front

How does temperature affect pH?

Back

Temperature can affect the ionization of water, thus influencing the pH of a solution; generally, higher temperatures can lower pH.

Front

What is the significance of a pH of 7.4 in biological systems?

Back

A pH of 7.4 is crucial for human blood, as it is necessary for proper enzyme function and metabolic processes.

Front

What is a buffer solution?

Back

A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added.

Front

How do strong acids differ from weak acids?

Back

Strong acids completely dissociate in water, while weak acids only partially dissociate.

Front

What is the role of pH indicators?

Back

pH indicators are substances that change color at specific pH levels, allowing for the determination of acidity or basicity.