Science 1.5Demonstrate an understanding of chemical ideas relating to acids and bases
Achievement Demonstrate understanding involves describing, identifying, naming, drawing, giving an account of chemical ideas relating to acids and bases. This requires the use of chemistry vocabulary, symbols and conventions including names, formulae and completing word equations.
Merit Demonstrate detailed understanding requires making and explaining links between chemical ideas relating to acids and bases. This requires explanations that use chemistry vocabulary, symbols and conventions including names, formulae and writing word equations or completing given symbol equations.
Excellence Demonstrate comprehensive understanding will typically involve elaborating, justifying, relating, evaluating, comparing and contrasting, or analysing links between chemical ideas relating to acids and bases. This requires the consistent use of chemistry vocabulary, symbols and conventions including writing balanced symbol equations.
Chemical ideas relating to acids and bases will be selected from: ·Atomic structure -electron arrangement of atoms and monatomic ions of the first 20 elements(a periodic table will be provided) -isotopes -ionic bonding -names and formulae of ionic compounds using a given table of ions. ·Rates of reaction and particle theory.
The relationship to acids and bases will be selected from: ·Properties -pH and effects on indicators -acids release hydrogen ions in water. ·Reactions of acids with bases to form salts. ·Uses -neutralisation -carbon dioxide formation -salt formation.
Acids and bases are restricted to HCl, H2SO4, HNO3, metal oxides, hydroxides, carbonates and hydrogen carbonates. Other acids may be used in questions, but names and formulae will be provided.
Demonstrate understanding involves describing, identifying, naming, drawing, giving an account of chemical ideas relating to acids and bases. This requires the use of chemistry vocabulary, symbols and conventions including names, formulae and completing word equations.
Demonstrate detailed understanding requires making and explaining links between chemical ideas relating to acids and bases. This requires explanations that use chemistry vocabulary, symbols and conventions including names, formulae and writing word equations or completing given symbol equations.
Demonstrate comprehensive understanding will typically involve elaborating, justifying, relating, evaluating, comparing and contrasting, or analysing links between chemical ideas relating to acids and bases. This requires the consistent use of chemistry vocabulary, symbols and conventions including writing balanced symbol equations.
· Atomic structure
- electron arrangement of atoms and monatomic ions of the first 20 elements (a periodic table will be provided)
- isotopes
- ionic bonding
- names and formulae of ionic compounds using a given table of ions.
· Rates of reaction and particle theory.
· Properties
- pH and effects on indicators
- acids release hydrogen ions in water.
· Reactions of acids with bases to form salts.
· Uses
- neutralisation
- carbon dioxide formation
- salt formation.