Acids and Bases - Edexcel IGCSE Chemistry

Complete lessons and workbook

Content

• Describe the use of litmus, phenolphthalein and methyl orange
  to distinguish between acidic & alkaline solutions
• Understand how to use the pH scale, from 0–14, to classify
  solutions as strongly acidic (0-3), weakly acidic (4-6), neutral (7),
  weakly alkaline (8-10) and strongly alkaline (11-14)
• Describe the use of Universal Indicator to measure the
  approximate pH value of an aqueous solution
• Know that acids in aqueous solution are a source of hydrogen
  ions and alkalis in an aqueous solution are sources of hydroxide
  ions
• Know that metal oxides, metal hydroxides and ammonia can be
  classified as bases and that alkalis are bases that are soluble in
  water
• Know that bases can neutralise acids
• Understand acids and bases in terms of proton transfer and that
  an acid is a proton donor and a base is a proton acceptor
• Understand how to use acid-base character of oxides to classify
  elements as metals or non-metals
• Describe the combustion of elements in oxygen, including
  magnesium, hydrogen and sulfur
• Describe the reactions of hydrochloric, sulfuric and nitric acids
  with:

1. metals (but not with nitric acid)
2. bases
3. metal carbonates

• Describe an experiment to prepare a pure, dry sample of a
  soluble salt starting from an insoluble reactant
• Describe an experiment to prepare a pure, dry sample of a
  soluble salt starting from an acid and an alkali
• Describe an experiment to prepare a pure, dry sample of an
  insoluble salt starting from two soluble reactants