Electrolysis of solutions
We came across electrolysis of molten metal salts and of solutions at GCSE, and the good news is, nothing has
Category: Exam question practice
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
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 of neutralisation
Determining either the enthalpy change of neutralisation, or the enthalpy change for a classic displacement reaction (they are pretty much
Atomic absorption and emission spectroscopy
How can we possibly know what elements are present in the stars? It’s not like we can nip off and
Why are ionic compounds soluble? (part 2)
For a full understanding of why ionic compounds are soluble we need to consider both the enthalpy and entropy changes
Born-Haber cycles
Born-Haber cycles are simply a fancy Hess cycle transposed onto an energy level diagram and we can use them to
A note on Gibbs free energy
The change in Gibbs free energy, ΔG, is a convenient way to determine whether a reaction is spontaneous or feasible
How to determine whether a reaction is feasible
A spontaneous or feasible process must be accompanied by a positive change in total entropy (entropy of the universe). Whether
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Titration – experimental technique questions
Questions based on carrying out titration and interpreting the results are common both at AS and A level. Before we
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