Unit 6: Acids and Bases

Front

What is the pH scale?

Back

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

Front

How is pH calculated from hydrogen ion concentration?

Back

pH = -log[H+], where [H+] is the concentration of hydrogen ions in moles per liter.

Front

What is the pH of a neutral solution at 25°C?

Back

7

Front

What does a pH less than 7 indicate?

Back

A pH less than 7 indicates that the solution is acidic.

Front

What does a pH greater than 7 indicate?

Back

A pH greater than 7 indicates that the solution is basic.

Front

What is an acid?

Back

An acid is a substance that donates hydrogen ions (H+) in a solution.

Front

What is a base?

Back

A base is a substance that accepts hydrogen ions (H+) or donates hydroxide ions (OH-) in a solution.

Front

What is the relationship between hydrogen ion concentration and pH?

Back

As hydrogen ion concentration increases, pH decreases, indicating a more acidic solution.

Front

What is the pH of lemon juice?

Back

Lemon juice typically has a pH around 2, making it acidic.

Front

What is the pH of hydrochloric acid?

Back

Hydrochloric acid has a pH of around 1, making it very acidic.