The ultimate A level chemistry resource
Electrolysis is a non-spontaneous chemical process powered by electrical energy. The reactions happening at the electrodes in the electrolysis of
Continue readingExplaining the electrolysis of molten ionic salts
There are many reactions which happen as the stoichiometric (chemical) equation would suggest … e.g. the reaction between chlorine radicals
Continue readingReaction mechanisms, intermediates and the rate determining step
For almost all reactions there is an energy barrier to overcome – this is known as the activation energy, Ea,
Continue readingUsing the Arrhenius equation to find the activation energy for a reaction
The decomposition of dinitrogen pentoxide is a first order reaction . 2N2O5(g) ⇾ 4NO2(g) + O2(g) The rate of the
Continue readingDifferential and integrated rate equations for first order reactions
All first order reactions have a constant half life, t½, which means that the time taken for the concentration of
A clock reaction can be used to measure the rate of reaction in certain circumstances. In a typical reaction the
We can use a colorimeter to follow the rate of a reaction if one of the reactants or products is
Continue readingUsing colorimetry to follow the rate of a reaction
In order to write a rate equation (rate law) for a reaction we need to know the orders of reaction
Continue readingDetermining orders of reaction and a rate equation from experimental data
The reaction between hydroxide ions and bromoethane involves a collision between a molecule of each of the reactants, which means
Continue readingUnderstanding the rate law and orders of reaction
Just because a reaction is feasible, it doesn’t mean that it will happen at a rate by which we are