Unit 2: Some very important chemicals Acids and bases.

students should:

• recognise acids and bases as types of compounds with specific properties and that many of them appear in everyday life.
• know the pH scale and the use of indicators.
• know that indicators are usually complex chemicals which change colour in the presence of acids and bases.
• know the difference between strength (chemical reactivity) and concentration of acids.
• understand that bases are the chemical opposite of acids and that they always neutralise producing a salt and water.
• recognise the names and formulae of some simple acids and bases.
• understand the idea that specific amounts of reactants are required for complete reaction, the idea of an excess.
• know the dangers associated with corrosive compounds.
• become familiar with the use of pipettes, burettes, and standard laboratory glassware