GCSE Chemistry - Purity and Formulations #62

What is the primary focus of chemical analysis?

• Creating new chemical compounds

• Separating, identifying, and quantifying substances

• Developing new chemical reactions

• Studying the history of chemistry

Why is it important to know if a substance is pure?

• Pure substances are less dense

• Pure substances are more colorful

• Pure substances are always safe to consume

• Pure substances have specific melting and boiling points

How do impurities generally affect the boiling point of a substance?

• They have no effect on the boiling point

• They make the boiling point unpredictable

• They decrease the boiling point

• They increase the boiling point

What is a formulation in chemistry?

• A mixture with precise amounts of components

• A chemical reaction

• A pure element

• A random combination of substances

Which of the following is an example of a formulation?

• Salt water

• Sodium chloride

• Pure water

• Green paint