science- more chemical reactions

year 8 more chemical reactions booklet definitions and key terms

acid+alkali>

salt+water

acid+metal>

salt+ hydrogen

acid+metal carbonate>

salt+carbon dioxide+water

the principle of conversion of mass

the mass of the reactants is the same as the mass of the products

corrosion

reaction of metals with water and oxygen

rusting

corrosion of iron and steel

what is teh word eqation for rusting

iron+oxygen+water> hydrated iron (III) oxide

give 3 examples of ways to stop rusting

tin coating, paint, oil

list the metals in order of most to least reactive

potassium, sodium, calcium, magnesium, aliminium, zinc, iron, copper, silver, gold

what rule can you use to find out if displacement will occur

a more reactive metal will displace a less reactive metal from it compound

what is the word equation for thermal decomposition

metal carbonate> metal oxide+ carbon dioxide

exothermic reactions

when the reaction releases heat and makes the surrounding area hotter

endothermic reactions

when the reaction releases cold and makes the surrounding area colder