pH Scale

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 is an acid?

Back

An acid is a substance that releases hydrogen ions (H+) in solution and has a pH less than 7.

Front

What is a base?

Back

A base is a substance that releases hydroxide ions (OH-) in 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 does it mean if a solution has a low pH?

Back

A low pH indicates that the solution is acidic, meaning it has a higher concentration of hydrogen ions.

Front

What does it mean if a solution has a high pH?

Back

A high pH indicates that the solution is basic (alkaline), meaning it has a higher concentration of hydroxide ions.

Front

What is the pH of lemon juice?

Back

Lemon juice typically has a pH around 2, making it very acidic.

Front

What is the pH of baking soda?

Back

Baking soda has a pH around 9, making it a basic substance.

Front

What is the significance of a pH of 7?

Back

A pH of 7 is considered neutral, indicating a balance between acids and bases.

Front

What is an example of a strong acid?

Back

Hydrochloric acid (HCl) is an example of a strong acid.