Chemistry — Properties of Materials

Acidity, alkalinity and indicatorsSign up

Understand that all substances have chemical properties and physical properties. · Understand that the acidity or alkalinity of a substance is a chemical property and is measured by pH. · Use indicators (including Universal Indicator and litmus) to distinguish between acidic, alkaline and neutral solutions.

Gas tests, metals and alloysSign up

Use tests to identify hydrogen, carbon dioxide and oxygen gases. · Describe common differences between metals and non-metals, referring to their physical properties. · Understand that alloys are mixtures that have different chemical and physical properties from the constituent substances. · Use the particle model to explain the difference in hardness between pure metals and their alloys.