Calculations for AS and A level Chemistry
Being confident in tackling different types of mole calculation is the foundation upon which much of A level chemistry stands
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Redox titration exam question practice
Redox titration questions are very popular on exam papers. They are usually set in an unfamiliar context and may require
Writing balanced redox equations using half equations
Given two half equations, we need to be able to write a fully balanced redox equation both under acidic and
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Rules for assigning oxidation states
When the products of a reaction are molecular, or there are polyatomic ions such as SO42- involved, it is not
What is a redox reaction?
Reactions in which both oxidation and reduction occur are called redox reactions. The acronym OILRIG might be familiar, reminding us
Using bond enthalpies to calculate an enthalpy change of reaction
Reactions are either endothermic or exothermic – the heat transferred during a chemical reaction is either moving from the system
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Enthalpy cycles, Hess cycles, thermochemical cycles
What is enthalpy exactly? An enthalpy change is the heat transferred at constant pressure by a chemical reaction Heat changes
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How to calculate enthalpy of neutralisation
Determining either the enthalpy change of neutralisation, or the enthalpy change for a classic displacement reaction (they are pretty much
How to calculate enthalpy of combustion of a fuel
You can calculate an experimental value for the enthalpy change of combustion for a fuel very simply – this is
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Getting up to speed in thermochemistry
Thermochemistry is all about the energy changes that happen alongside chemical reactions. Chemical reactions either release heat (exothermic) or
How to choose an indicator for an acid-base titration
An indicator is used to follow the progress of an acid-base titration and the end point of the reaction is
Continue readingHow to choose an indicator for an acid-base titration