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
Category: Calculations
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
Continue readingUsing bond enthalpies to calculate an enthalpy change of reaction
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
Continue readingEnthalpy cycles, Hess cycles, thermochemical cycles
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
Continue readingHow to calculate enthalpy of combustion of a fuel
What is a buffer and how do I calculate its pH?
A buffer is defined as a solution that is able to resist changes in pH when small amounts of acid
Continue readingWhat is a buffer and how do I calculate its pH?
How to calculate the pH of a base
Once again, we can assume that strong bases are fully dissociated in solution so the concentration of OH– is the
How to calculate the pH of strong acids and weak acids
The strength of an acid (HA) is determined by its ability to donate protons or H+ ions to water. The [H+(aq)]
Continue readingHow to calculate the pH of strong acids and weak acids
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