SCIENCE FORM 2

Front

What is an alkali?

Back

An alkali is a type of base that dissolves in water and has a pH greater than 7.

Front

What is a strong alkali?

Back

A strong alkali is a substance that completely dissociates in water to produce hydroxide ions (OH-). Example: Sodium hydroxide.

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 strong acid?

Back

A strong acid is an acid that completely dissociates in water. Example: Hydrochloric acid.

Front

What is a weak acid?

Back

A weak acid is an acid that does not completely dissociate in water. Example: Ethanoic acid.

Front

What is neutralization?

Back

Neutralization is a chemical reaction between an acid and a base that produces water and a salt.

Front

What is the role of an indicator in a neutralization reaction?

Back

An indicator shows the pH change in a solution, helping to identify when the solution is neutral.

Front

What is pH?

Back

pH is a scale that measures how acidic or basic a solution is, ranging from 0 (very acidic) to 14 (very basic).

Front

What is the pH of pure water?

Back

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

Front

What is the pH of toothpaste?

Back

The pH of toothpaste is typically around 8, which is slightly basic.