Acids and Bases

Front

What is the pH scale?

Back

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

Front

What does a pH of 3 indicate about a substance?

Back

A substance with a pH of 3 is considered acidic.

Front

What is the chemical formula for phosphoric acid?

Back

The chemical formula for phosphoric acid is H₃PO₄.

Front

What is the pH of pure water?

Back

The pH of pure water is 7, indicating it is a neutral substance.

Front

Which substance is more acidic than lemons according to the pH scale?

Back

A battery is more acidic than lemons.

Front

What is the name of the acid with the formula H₂S?

Back

The acid with the formula H₂S is called Hydrosulfuric acid.

Front

What is an acid?

Back

An acid is a substance that donates protons (H⁺ ions) 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⁺ ions) or donates hydroxide ions (OH⁻) in a solution and has a pH greater than 7.

Front

What is a neutral substance?

Back

A neutral substance is one that has a pH of 7, meaning it is neither acidic nor basic.

Front

What is the difference between strong and weak acids?

Back

Strong acids completely dissociate in water, while weak acids only partially dissociate.