2.2 Acids, Bases, Buffers, pH

Front

What is an acid?

Back

An acid is a substance that donates protons (H+) in a chemical reaction and typically has a pH less than 7.

Front

What is a base?

Back

A base is a substance that accepts protons (H+) or produces hydroxide ions (OH-) in a solution, typically having a pH greater than 7.

Front

What is pH?

Back

pH is a measure of the acidity or basicity of a solution, on a scale from 0 to 14, where 7 is neutral.

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, typically composed of a weak acid and its conjugate base.

Front

What happens to pH when an acid is added to water?

Back

The pH decreases, indicating an increase in acidity.

Front

What happens to pH when a base is added to water?

Back

The pH increases, indicating an increase in basicity.

Front

What is the pH range of human blood?

Back

The pH of human blood ranges from 7.35 to 7.45, making it slightly basic.

Front

What is an indicator?

Back

An indicator is a substance that changes color in response to the acidity or basicity of a solution.

Front

What is the relationship between pH and pOH?

Back

pH and pOH are related by the equation: pH + pOH = 14.

Front

What is a strong acid?

Back

A strong acid is an acid that completely dissociates in water, releasing all of its protons.