Acids and Bases

Front

What is the pH scale?

Back

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

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.

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 a neutral solution?

Back

A neutral solution has a pH of 7, meaning it is neither acidic nor basic, like pure water.

Front

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

Back

The pH of the solution decreases, making it more acidic.

Front

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

Back

The pH of the solution increases, making it more basic.

Front

What is the strongest acid on the pH scale?

Back

The strongest acid has a pH close to 0.

Front

What is the strongest base on the pH scale?

Back

The strongest base has a pH close to 14.

Front

How does the concentration of hydrogen ions affect pH?

Back

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

Front

How does the concentration of hydroxide ions affect pH?

Back

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