Acids and Bases

Front

What is the pH scale and what does it measure?

Back

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

Front

How does the concentration of H+ ions relate to pH?

Back

The pH of a solution is inversely related to the concentration of hydrogen ions (H+); as the concentration of H+ increases, the pH decreases.

Front

What is the difference between a strong acid and a weak acid?

Back

A strong acid completely dissociates in water, releasing all its H+ ions, while a weak acid only partially dissociates.

Front

What is the significance of a pH of 7?

Back

A pH of 7 is considered neutral, meaning the concentration of H+ ions is equal to that of OH- ions.

Front

How many times more acidic is a solution with a pH of 3 compared to a solution with a pH of 6?

Back

A solution with a pH of 3 is 1,000 times more acidic than a solution with a pH of 6.

Front

What role do buffers play in biological systems?

Back

Buffers help maintain a stable pH in biological systems by neutralizing small amounts of added acid or base.

Front

What is the typical pH range of human blood?

Back

The typical pH range of human blood is around 7.35 to 7.45.

Front

What is an example of a strong acid?

Back

An example of a strong acid is hydrochloric acid (HCl).

Front

What is an example of a weak acid?

Back

An example of a weak acid is acetic acid (CH3COOH).

Front

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

Back

When a strong base is added to a solution, the pH increases, making the solution more basic.