OILRIG: Oxidation is loss of electrons and increase in oxidation number. Reduction is gain of electrons and decrease in oxidation number. Redox: A reaction where both oxidation and reduction take place. Oxidation Number: A measure of the number of electrons that...
Redox titrations similar to acid- base titration. If don’t know which way round colour changes, look at table to see what’s added. Manganate (VII) Titrations: Potassium manganate (VII) KMnO4 under acidic conditions. Potassium manganate can be replaced by other...
Iodine/ Thiosulfate Titrations: Oxidising agent must first oxidise I- ions to I2. Then thiosulfate ions S2O3 2- are oxidised and iodine reduced. Amount of iodine can be determined. As well iodine, other oxidising agents can be determined such as chlorate ions ClO- in...
Voltaic Cell: A voltaic cell is a type of electrochemical cell, which converts chemical energy to electrical energy. Chemical energy from movement of electrons, so use redox reactions as they transfer electrons. Half Cell: A half-cell contains species present in...
Predicting Feasibility: Can predict feasibility of reaction from standard electrode potentials. A reaction takes place when the one being reduced (and on left) has a more positive E o value than one being oxidised (and on right). This works as higher E o value means...
Modern Cells and Batteries: Modern cells and batteries based on two electrodes with different electrode potentials. Three main times of cells- primary, secondary and fuel cells. Primary Cells: Primary cells are non- rechargeable. Electricity is produced by oxidation...