Identifying Acids & Bases

Front

What is the pH scale?

Back

The pH scale is a measure of how acidic or basic a substance is, ranging from 0 to 14.

Front

What pH value indicates a neutral substance?

Back

A pH value of 7 indicates a neutral substance.

Front

Where can you find the most dangerous acids and bases on the pH scale?

Back

On both ends of the scale.

Front

What color does phenolphthalein turn in acidic solutions?

Back

Phenolphthalein turns colorless in acidic solutions.

Front

What color does phenolphthalein turn in basic solutions?

Back

Phenolphthalein turns deep pink in basic solutions.

Front

Which fruit is more acidic, oranges or bananas?

Back

Oranges are more acidic than bananas.

Front

What is an acid?

Back

An acid is a substance that donates protons (H+) and has a pH less than 7.

Front

What is a base?

Back

A base is a substance that accepts protons (H+) and has a pH greater than 7.

Front

What is the range of the pH scale?

Back

The pH scale ranges from 0 (very acidic) to 14 (very basic).

Front

What happens to the pH of a solution when an acid is added?

Back

The pH of the solution decreases (becomes more acidic).