Explaining the chemistry of the Group 7
Group 7 consists of the elements fluorine, chorine, bromine, iodine and astatine, and they are known as the halogens. All
The ultimate A level chemistry resource
Group 7 consists of the elements fluorine, chorine, bromine, iodine and astatine, and they are known as the halogens. All
This is not just another set of exam questions with exam board style mark schemes. You can find plenty of
We came across electrolysis of molten metal salts and of solutions at GCSE, and the good news is, nothing has
Fuel cells commonly use the reaction between hydrogen and oxygen to produce a voltage, with water being the only waste
Modern storage cells (batteries) can be divided into the non-rechargeable kind (primary cells) and the rechargeable kind (secondary cells). Primary
The rusting of iron can be summarised by the equation 4 Fe(s) + 3 O2(g) + H2O(l) ⇾ 2 Fe2O3•xH2O(s)
A redox reaction consists of two half reactions – an oxidation and a reduction reaction. If we take a pair
Continue readingPredicting the feasibility of redox reactions using standard electrode potentials
We can link any two half cells together to form an electrochemical cell. A high resistance voltmeter prevents current (electrons)
Continue readingDetermining the potential difference of an electrochemical cell
If we place a strip of a metal such as zinc into a beaker containing zinc sulphate (the electrolyte) an
Often writing a half equation to show reduction or oxidation is straight forward – all we need to do is
Continue readingUsing oxidation states to balance half equations