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.

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

Front

What is a neutral substance?

Back

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

Front

What is an indicator?

Back

An indicator is a substance that changes color in response to the acidity or basicity of a solution.

Front

What is the effect of acids on litmus paper?

Back

Acids turn blue litmus paper red.

Front

What is the effect of bases on litmus paper?

Back

Bases turn red litmus paper blue.

Front

What is heartburn and how is it related to acids and bases?

Back

Heartburn occurs when stomach acid flows back into the esophagus; antacids, which are basic, can help neutralize this acid.

Front

What is the difference between strong and weak acids?

Back

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

Front

What is the pH of pure water?

Back

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