Acids and Bases

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a substance 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 substance?

Back

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

Front

What happens to litmus paper in an acid?

Back

Acids turn blue litmus paper red.

Front

What happens to litmus paper in a base?

Back

Bases turn red litmus paper blue.

Front

What is the pH range of strong acids?

Back

The pH range of strong acids is typically from 0 to 3.

Front

What is the pH range of weak acids?

Back

The pH range of weak acids is typically from 4 to 6.

Front

What is the pH range of weak bases?

Back

The pH range of weak bases is typically from 8 to 10.

Front

What is the pH range of strong bases?

Back

The pH range of strong bases is typically from 11 to 14.