Mole quantities lab

Learning objectives

• interpret chemical equations with state symbols
• perform calculations involving the relationship between the amount of substances in moles, mass and molar mass (calculations of stoichiometric reacting masses and volumes of gases are not required).
• define the term mole in terms of the Avogadro constant
• calculate stoichiometric reacting masses and volumes of gases (one mole of gas occupies 24 dm3 at room temperature and pressure); calculations involving the idea of limiting reactants may be set (knowledge of the gas laws and the calculations of gaseous volumes at different temperatures and pressures are not required)
• apply the concept of solution concentration (in mol/dm3 or g/dm3) to process the results of volumetric experiments (e.g. titration) and to solve simple problems. (appropriate guidance will be provided where unfamiliar reactions such as redox are involved. Calculations on % yield and % purity are not required.)
• apply the concept of solution concentration (in mol/dm3 or g/dm3) to process the results of volumetric experiments (e.g. titration) and to solve simple problems (appropriate guidance will be provided where unfamiliar reactions are involved)
• calculate % yield and % purity.
• 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)
• Mole and Avogadro Constant
• Reacting Masses and Limiting Reagent
• Gas Calculations (pV = nRT)
• Solution Concentration and Dilution
• Titration Calculations