Relative atomic mass, relative formula mass, etc . . .
An introduction to the basic ideas lying behind all chemistry calculations.
Introducing the mole concept . . .
The mole is an essential measure of the amount of a substance in chemistry. This is probably the most important page in this section.
Finding the formulae of compounds experimentally . . .
Explains how the mole concept can be used to find or confirm the formulae of compounds.
Calculations from equations involving masses . . .
Calculating the mass of product from a known mass of reactant, or how much reactant is needed to produce the amount of product you need.
Calculations from equations involving gases . . .
Avogadro's Hypothesis. The molar volume of a gas. Calculations from equations involving gases.
An introduction to calculations in equations involving solutions . . .
Introducing the various ways concentrations of solutions can be given, and some simple examples involving them.
Titration calculations . . .
An introduction to calculations involving acids and alkalis in solution.
Limiting reagent and atom economy calculations . . .
Explains what is meant by "limiting reagent" and "atom economy" and a look at the calculations involved.
Electrolysis calculations . . .
The Faraday constant, and how to use it in simple electrolysis calculations
Energy calculations - practical . . .
Measuring the heat evolved or absorbed during reactions, and working out the enthalpy change of a reaction.
Energy calculations - bond energies . . .
Using bond energies (enthalpies) to estimate enthalpy changes of reactions.