Chemistry-30 Acids and bases

Front

What is an acid?

Back

An acid is a substance that donates hydrogen ions (H+) in an aqueous solution, resulting in a pH less than 7.

Front

What is a base?

Back

A base is a substance that accepts hydrogen ions (H+) or donates hydroxide ions (OH-) in an aqueous solution, resulting in a pH greater than 7.

Front

What is the pH scale?

Back

The pH scale measures the concentration of hydrogen ions in a solution, ranging from 0 (strongly acidic) to 14 (strongly basic), with 7 being neutral.

Front

What is the pH of a neutral solution?

Back

The pH of a neutral solution is 7.

Front

What happens to litmus paper in an acidic solution?

Back

Litmus paper turns red in an acidic solution.

Front

What happens to litmus paper in a basic solution?

Back

Litmus paper turns blue in a basic solution.

Front

What is the pH of a 0.01 M NaOH solution?

Back

The pH of a 0.01 M NaOH solution is 12.

Front

What is phenolphthalein?

Back

Phenolphthalein is a pH indicator that turns from clear to pink as the pH of a solution becomes basic.

Front

What is a strong acid?

Back

A strong acid is an acid that completely dissociates in water, releasing all of its hydrogen ions.

Front

What is a weak acid?

Back

A weak acid is an acid that partially dissociates in water, resulting in a lower concentration of hydrogen ions.