Disco Displacement

Let me think about it Lets get together Mg Cu SO4

Mg Zn SO4

Fe SO4 Zn

No way Granny!! Cu SO4 Pb

You say you need me! SO4 Zn How can you leave me? Cu

SO4 Pb

Write the symbol and the word equation Disco Displacement Write the symbol and the word equation Mg magnesium + CuSO4 Copper sulphate = ZnSO4 Zn zinc FeSO4 Cu copper PbSO4

Disco Displacement Mg + CuSO4 = MgSO4 magnesium sulphate Cu copper Copper sulphate = MgSO4 magnesium sulphate Cu copper ZnSO4 Zinc sulphate Zn zinc FeSO4 iron sulphate ZnSO4 zinc sulphate Fe iron Cu copper PbSO4 lead sulphate No reaction copper sulphate zinc sulphate

Magnesium  copper sulphate + magnesium magnesium sulphate + copper Mg __SO4  ___SO4 Cu  zinc sulphate + magnesium magnesium sulphate + zinc ___ + ZnSO4  MgSO4  iron sulphate + magnesium magnesium sulphate + iron ____ + __________  MgSO4 Fe

Magnesium  copper sulphate + magnesium magnesium sulphate + copper Mg CuSO4  MgSO4 Cu  zinc sulphate + magnesium magnesium sulphate + zinc Mg + ZnSO4  MgSO4 Zn  iron sulphate + magnesium magnesium sulphate + iron Mg + FeSO4  MgSO4 Fe

Zinc  magnesium sulphate + Zinc Zn + ____SO4  -  iron sulphate + zinc sulphate + _____ _____ + __________  _________ Fe  copper sulphate + Zinc _________ __________ + copper _____ + _________  __________ ___________

Zinc  magnesium sulphate + Zinc No reaction Zn + MgSO4  -  iron sulphate + Zinc zinc sulphate + iron Zn + FeSO4  ZnSO4 Fe  copper sulphate + Zinc zinc sulphate + copper Zn + CuSO4  ZnSO4 Cu

Thermit reaction Aluminium + iron oxide = aluminium oxide + iron Al + FeO = AlO + Fe

Displacement of oxides A more reactive metal can displace a less reactive one from a solution of one of its salts. Similar reactions take place with solid reactants such as the oxides. E.g.  iron oxide + aluminium aluminium oxide + iron The more reactive aluminium wins the oxygen from the less reactive iron. This reaction gets so hot that the iron melts!

Iron is in the middle of the three in activity  zinc oxide + iron No reaction Fe + ZnO  -  copper oxide + iron iron oxide + copper 2Fe + 3CuO  Fe2O3 3Cu

Zinc is the most reactive of the three metals.  copper oxide + zinc zinc oxide + copper Zn + CuO  ZnO Cu  iron oxide + zinc zinc oxide + iron 3Zn + 2Fe2O3  3ZnO 2Fe

Copper Copper is low in the activity series and will not displace either of these metals  zinc oxide + copper No reaction Cu + ZnO  -  iron oxide + copper No reaction Cu + Fe2O3  -

Will it react: Yes or no?. Activity Reactants Reaction? iron oxide magnesium copper sulphate zinc potassium hydrochloric acid gold iron chloride calcium sodium chloride oxygen Potassium Sodium Calcium Magnesium Aluminium Zinc Iron Lead Copper Silver Gold Yes Yes Yes!! No No Yes

CuSO4

ZnSO4

ZnSO4

ZnSO4

FeSO4

FeSO4

PbSO4

MgSO4

MgSO4

No reaction

Mg

Mg

Zn

Zn

Zn

Cu

Cu

Fe

Fe

+

+

+

+

+

+

+

+

+

=

=

=

=

=