Electrochemistry
- Electrolysis.
Electrolysis refers to the decomposition of a substance by an electric current. The electrolysis of sodium and potassium hydroxides, first carried out in 1808 by Sir Humphrey Davey, led to the discovery of these two metallic elements...
- Writing Electronic Configurations
← Back to Atomic Structure To present the electronic configuration of a species, we need to observe 3 rules/ principles in filling up the atomic orbitals: Lowest energy first (Aufbau Principle) Within each subshell, fill up singly before...
- Oxidation Number
← Back to Electrochemistry Oxidation numbers are arbitrary numbers assigned to atoms to describe their relative state of oxidation or reduction i.e. how oxidised or reduced they are. They are assigned according to an arbitrary set of rules:...
- H2 Chemistry Syllabus (2008)
PHYSICAL CHEMISTRY 1. ATOMS, MOLECULES AND STOICHIOMETRY • Relative masses of atoms and molecules • The mole, the Avogadro constant • The calculation of empirical and molecular formulae • Reacting masses and volumes (of solutions and gases) 2....
- Thermochemistry : 9.2 Hess Law
Hess's Law of Heat Summation When reactants are converted to products, the change in enthalpy is the same whether the reaction take step in one step or in a series of step. ΔH1 =ΔH2 + ΔH3 Application Using Hess's...
Electrochemistry
Transition Elements
- Electrolysis.
Electrolysis refers to the decomposition of a substance by an electric current. The electrolysis of sodium and potassium hydroxides, first carried out in 1808 by Sir Humphrey Davey, led to the discovery of these two metallic elements...
- Writing Electronic Configurations
← Back to Atomic Structure To present the electronic configuration of a species, we need to observe 3 rules/ principles in filling up the atomic orbitals: Lowest energy first (Aufbau Principle) Within each subshell, fill up singly before...
- Oxidation Number
← Back to Electrochemistry Oxidation numbers are arbitrary numbers assigned to atoms to describe their relative state of oxidation or reduction i.e. how oxidised or reduced they are. They are assigned according to an arbitrary set of rules:...
- H2 Chemistry Syllabus (2008)
PHYSICAL CHEMISTRY 1. ATOMS, MOLECULES AND STOICHIOMETRY • Relative masses of atoms and molecules • The mole, the Avogadro constant • The calculation of empirical and molecular formulae • Reacting masses and volumes (of solutions and gases) 2....
- Thermochemistry : 9.2 Hess Law
Hess's Law of Heat Summation When reactants are converted to products, the change in enthalpy is the same whether the reaction take step in one step or in a series of step. ΔH1 =ΔH2 + ΔH3 Application Using Hess's...