precipitate
Insoluble solid compound produced from 2 liquids during a chemical reaction.
effervescence
bubbles of gas given off during a chemical reaction; may or may not have an odour.
chemical equation
Written representation of a chemical reaction; shows all the reactants and products. Always in the form of: Reactants arrow Products.
compound
a chemical made of a combination of 2 or more different atoms.
molecule
2 or more atoms held together by chemical bonds (could be elements or compounds)
2, 1, 2
__Na + __F? ? __NaF
1, 1, 1
__MgO + __SO? ? __MgSO?
1, 3, 2, 3
__Al?(SO?)? + __Ca(OH)? ? __Al(OH)? + __CaSO?
3, 2, 2, 3
__Al + __Cu(NO?)? --> __Cu + __Al(NO?)?
1, 2, 1, 1
__Mg + __HF ? __MgF? + __H?
3, 2, 3, 2
__Mg + __AlCl? ? __MgCl? +__Al
thermal decomposition reaction
a single reactant breaks down to form multiple products
combustion reaction
a carbon based fuel and oxygen react to form carbon dioxide and water
Oxidation reaction
Any reaction where oxygen is gained (or electrons are lost) by an atom or compound
Polymerisation reaction
Long chain molecules are formed when lots of smaller molecules (of the same type) called monomers are stuck together
Displacement reaction
A more reactive metal atom changes places with a less reactive metal atom in a compound
Neutralisation reaction
When an acid reacts with a base to form a salt plus water (forming a salt solution with a pH of 7)