Acids and Bases

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. Examples include vinegar and lemon juice.

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. Examples include baking soda and dishwashing detergent.

Front

What is pH?

Back

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

Front

What happens when an acid and a base are mixed?

Back

When an acid and a base of equal strength are mixed, they neutralize each other, resulting in a neutral solution.

Front

What is a neutral solution?

Back

A neutral solution has a pH of 7, meaning it is neither acidic nor basic. Pure water is an example.

Front

What is phenolphthalein?

Back

Phenolphthalein is a pH indicator that turns pink in basic solutions and is colorless in acidic or neutral solutions.

Front

What is an example of a strong acid?

Back

Hydrochloric acid (HCl) is an example of a strong acid, which completely dissociates in water.

Front

What is an example of a strong base?

Back

Sodium hydroxide (NaOH) is an example of a strong base, which completely dissociates in water.

Front

What is the role of indicators in acid-base chemistry?

Back

Indicators are substances that change color in response to the pH of a solution, helping to identify whether a solution is acidic, basic, or neutral.

Front

What is the difference between a strong acid and a weak acid?

Back

A strong acid completely dissociates in water, while a weak acid only partially dissociates.