Acids, bases and pH

Front

What is an electrolyte?

Back

An electrolyte is a substance that produces ions when dissolved in water, allowing it to conduct electricity. Examples include acids, bases, and salts.

Front

Which substance is more acidic than lemon juice?

Back

Hydrochloric acid is more acidic than lemon juice.

Front

What is Ca(OH)₂?

Back

Ca(OH)₂ is calcium hydroxide, which is a base.

Front

What taste do bases have?

Back

Bases taste bitter.

Front

Which statement is NOT true about acids?

Back

Acids do not turn red litmus paper blue.

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a substance 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 donates protons (H⁺ ions) in a solution and has a pH less than 7.

Front

What is a base?

Back

A base is a substance that accepts protons (H⁺ ions) or donates hydroxide ions (OH⁻) in a solution and has a pH greater than 7.

Front

What happens to litmus paper in an acid?

Back

Litmus paper turns red in the presence of an acid.

Front

What happens to litmus paper in a base?

Back

Litmus paper turns blue in the presence of a base.