Acids, bases & pH

Front

What is an acid?

Back

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

Front

What is a base?

Back

A base is a substance that releases OH^- ions in solution and has a pH greater than 7.

Front

What is pH?

Back

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

Front

What happens to litmus paper when it comes in contact with an acid?

Back

Litmus paper turns red when it comes in contact with an acid.

Front

What happens to litmus paper when it comes in contact with a base?

Back

Litmus paper turns blue when it comes in contact with a base.

Front

What is the pH of a neutral solution?

Back

The pH of a neutral solution is 7.

Front

What does a low pH indicate about a solution?

Back

A low pH indicates a high concentration of H⁺ ions, meaning the solution is acidic.

Front

What does a high pH indicate about a solution?

Back

A high pH indicates a high concentration of OH^- ions, meaning the solution is basic.

Front

Give an example of a common acidic substance.

Back

Common acidic substances include vinegar and lemon juice.

Front

Give an example of a common basic substance.

Back

Common basic substances include baking soda and soap.