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Chapter 6: Chemical Reactions
 Identify redox reactions.
 Identify and write equations for
combustion reactions.
 A reaction can be classified as a redox
reaction if it meets any one of these
requirements.
 A substance reacts with elemental oxygen
(combustion).
 A metal reacts with a nonmetal.
 During single displacement reactions.
 More generally, one substance transfers
electrons to another substance.
2Na(s) + Cl2(g)  2NaCl(s)
 Na + Cl  Na+ + Cle-
 Combustion reactions are a type of
redox reaction.
 Combustion reactions are characterized
by the reaction of a substance with O2
to form one or more oxygen-containing
compounds, often including water.
 Combustion reactions are exothermic
(they emit heat).
 Compounds containing carbon and
hydrogen always form carbon dioxide
and water upon combustion.

CH4(g) + O2(g) 
2Mg(s) + O2(g)  2MgO(s)
 Mg + O
e- e-
2+
 Mg
2+O
 2Al(s) + Fe2O3(s)  2Fe(s) + Al2O3(s)
 Al + Fe3+  Fe + Al3+
e- -ee

For each reaction, show how electrons are gained and
lost:
 2Na (s) + Br2(l)  2NaBr (s)
 2Ca (s) + O2(g)  2CaO (s)

Predict the products for the following combustion
reactions:
 C6H14(l) + O2(g) 
 Cu(s) + O2(g) 

Classify each of the following reactions in as many ways
possible.
 2K (s) + Cl2(g)  2KCl (s)
 2Mg (s) + O2(g)  2MgO (s)

Classify each of the following reactions in as many ways
possible.
 Fe2O3(s) + 2Al(s)  Al2O3(s) + 2Fe(s)
 HNO3(aq) + NaOH(aq) → H2O(l) + NaNO3 (aq)
 Ba(NO3)2(aq) + (NH4)2SO4(aq) 
 HCl(aq) + KOH(aq) 
 Na(s) + Cl2(g) 
 FeCl3(aq) + NaOH(aq) 
 Zn(s) + HNO3(aq) 
 C6H14(l) + O2(g) 
 CuSO4(aq) + Na2CO3(aq) 
 HClO4(aq) + NaOH(aq) 
 NI3(s)
 ZnCl2(aq) + Mg(s) 
 H2SO4(aq) + Ba(OH)2(aq)
 KNO3(aq) + BaCl2(aq) 