Acids and Bases

Front

What is an acid?

Back

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

Tags

NGSS.MS-PS1-1

Front

What is a base?

Back

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

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 happens to blue litmus paper in an acid?

Back

Blue litmus paper turns red when it comes into contact with an acid.

Front

What happens to red litmus paper in a base?

Back

Red litmus paper turns blue when it comes into contact with a base.

Front

What is the pH of pure water?

Back

The pH of pure water is 7, which is considered neutral.

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 weak acid?

Back

A weak acid is an acid that partially dissociates in water, meaning not all of its hydrogen ions are released.

Front

What is the relationship between pH and hydrogen ion concentration?

Back

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

Front

What is an example of a common strong acid?

Back

Hydrochloric acid (HCl) is a common strong acid.