A change which makes a new substance, e.g. coal burning
salt + hydrogen
acid + metal
A change in which no new substance is made. The substance just changes to a different state, e.g. water boiling
the new substance that is made in a reaction
a substance made when an acid and a base react together.
A change which cannot be changed back from it's original form.
A change which can be changed back to its original form.
The oxide, hydroxide or carbonate of metal.
the chemical reaction of an acid with a base in which they cancel each other out.
if there is not enough oxygen the combustion is
The chemical opposite of an alkali. It has a ph number less than 7
Tells you how much nitrogen, phosphorus and pottasium is in a fertiliser
the reaction which occurs when a substance burns in oxygen giving out heat energy
A reaction that gives out heat energy to its surroundings
salt + water
acid + metal oxide
A reaction that takes in heat energy from it's surroundings
The reacton when oxygen is added too a substance
when one element takes the place of another in a compound
salts made from sulphuric acid
salt + carbon dioxide + water
acid + metal carbonate