Acids, Bases, & the pH Scale

Front

What are acids?

Back

Acids are substances that typically have a sour taste and turn blue litmus paper red. They have a pH less than 7.

Front

What are bases?

Back

Bases are substances that typically have a bitter taste and turn red litmus paper blue. They have a pH greater than 7.

Front

What is a neutral solution?

Back

A neutral solution is one that does not change the color of either blue or red litmus paper, indicating a pH of 7.

Front

What does the pH scale measure?

Back

The pH scale measures the strength of acids and bases, ranging from 0 (strongest acid) to 14 (strongest base).

Front

What pH level represents a strong acid?

Back

A pH level of 0 represents a strong acid.

Front

What pH level represents a strong base?

Back

A pH level of 12 represents a strong base.

Front

What happens to litmus paper in an acidic solution?

Back

In an acidic solution, blue litmus paper turns red.

Front

What happens to litmus paper in a basic solution?

Back

In a basic solution, red litmus paper turns blue.

Front

What is the pH of pure water?

Back

The pH of pure water is 7, which is considered neutral.

Front

What is the significance of a pH of 7?

Back

A pH of 7 indicates a neutral solution, meaning it is neither acidic nor basic.