An Exothermic reaction. Acetylene (Ethyne) releases a lot of energy when it burns.

Enter your text here ... Introduction ​Every chemical reaction has an accompanying change in energy. Some reactions release energy to the surroundings and are known as Exothermic. Reactions which take in energy from their surroundings are known as Endothermic  Enter your text here ... ​This shows a range of chemical changes - all of which rele...

Questions  :

 Crude oil is a mixture of alkanes ( hydrocarbons)

Use the animation to measure the bond angles in each of the three molecules below:

 a game to test your skills

The images below show how an ionic lattice forms 

Enter your text here ... The halogens are a family of elements in group 7 (aka 17) of the periodic table. in this video, you can see how reactive the halogens can be. you can also see the characteristic colours of: ​​​chlorine; a pale green gasbromine; a volatile orange-brown liquid.iodine; a shiny grey metallic-looking solid with a ...

image to show the tetrahedral shape of the methane molecule

the alkanes are a family of hydrocarbons. hydrocarbons are compounds containing hydrogen and carbon only. methane is the simplest hydrocarbon with the formula CH4. the rest of the "family" (aka:  homologous series)  is below: ​Methane CH4Ethane C2H6Propane C3H8Butane C4H10

Universal indicator is useful for giving an estimated value for the pH of a substance

Background  ​You should already know that: • some substances are acidic • the opposite of acidic is alkaline • acids and alkalis can be harmful • we can measure acidity or alkalinity using the pH scale Strong acids ​When an acid molecule ionises completely when in solution in water, it is regarded as a strong acid. It is said to...

reducing your carbon footprint Although this is aimed at students of the IB diploma - it is relevant to all .... Enter your text here ...