Acids, Bases, and pH Scale

Front

What is the pH scale?

Back

The pH scale is a measure of how acidic or basic a solution is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What pH number indicates a neutral solution?

Back

A pH of 7 indicates a neutral solution.

Front

What is an acid?

Back

An acid is a substance that donates hydrogen ions (H+) when dissolved in water, resulting in an increase in H3O+ concentration.

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 decrease in H3O+ concentration.

Front

What happens to the pH of a solution when an acid is added?

Back

The pH of the solution decreases (becomes more acidic) when an acid is added.

Front

What happens to the pH of a solution when a base is added?

Back

The pH of the solution increases (becomes more basic) when a base is added.

Front

What is the relationship between pH and hydrogen ion concentration?

Back

As the concentration of hydrogen ions (H+) increases, the pH decreases, indicating a more acidic solution.

Front

What is the relationship between pH and hydroxide ion concentration?

Back

As the concentration of hydroxide ions (OH-) increases, the pH increases, indicating a more basic solution.

Front

What is a strong acid?

Back

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

Front

What is a strong base?

Back

A strong base is a base that completely dissociates in water, releasing all of its hydroxide ions.