The Mole Concept and Stoichiometry structured questions · GCE A-Level H1 Chemistry

Learning objectives

• define the terms relative atomic, isotopic, molecular and formula mass
• define the term mole in terms of the Avogadro constant
• calculate the relative atomic mass of an element given the relative abundances of its isotopes
• define the terms empirical and molecular formula
• calculate empirical and molecular formulae using combustion data or composition by mass
• write and/or construct balanced equations
• describe and explain redox processes in terms of electron transfer and/or of changes in oxidation number (oxidation state) as exemplified by Fe3+/Fe2+ and MnO-4 /Mn2+
• construct redox equations using the relevant half-equations
• perform calculations, including use of the mole concept, involving: — reacting masses (from formulae and equations)
• perform calculations, including use of the mole concept, involving: — volumes of gases (e.g. in the burning of hydrocarbons)
• perform calculations, including use of the mole concept, involving: — volumes and concentrations of solutions [when performing calculations, candidates’ answers should reflect the number of significant figures given or asked for in the question]
• deduce stoichiometric relationships from calculations such as those in (i)