Acids and Bases

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a substance is, ranging from 0 (strongly acidic) to 14 (strongly basic), with 7 being neutral.

Front

What pH value indicates a strong acid?

Back

A strong acid has a pH value closer to 0, with 1 being one of the strongest.

Front

What is the pH of pure water?

Back

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

Front

What does a pH value below 7 indicate?

Back

A pH value below 7 indicates that a substance is acidic.

Front

What does a pH value above 7 indicate?

Back

A pH value above 7 indicates that a substance is basic (alkaline).

Front

What does pH stand for?

Back

pH stands for 'Power of Hydrogen'.

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.

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.

Front

What is the relationship between pH and hydrogen ion concentration?

Back

The pH scale is logarithmic; a decrease of 1 in pH represents a tenfold increase in hydrogen ion concentration.

Front

What is an example of a strong acid?

Back

Hydrochloric acid (HCl) is an example of a strong acid.