InorganicChemistry英文PPT (32).ppt

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1、Oxidation reduction reactionRedox Oxidation-Get oxygen，Reduction-Loss of oxygen electron transfer （gain and loss，shift）The progress of redox conceptAt first:2Mg(s)+O2(g)=2MgO(s)combines with oxygenLater:Mg Mg2+2e electron transferCurrent:2P(s)+2Cl2(g)=2PCl3(l)electron shift6.1 Basic concepts of redo

2、x reactionChemical reactionRedox reactionNon redox reaction(Electronic reactions with gains or losses)For example:Zn+Cu2+=Zn2+Cu2eZn:Loss electron;oxidation;reducing agent.Cu2+:Get electron;be reduced;oxidizer.Oxidant+reductant reduction product+oxidation productThe valence goes up,oxidation reactio

3、nOxidation-reduction reaction:The reaction occurs,which gain and loss electrons(or electron shift)The valence goes down,the reduction reactionThe redox reaction consists of oxidation reaction and reduction reaction.Half-reactionHalf-reaction+Zn+Cu2+=Zn2+CuOxidation reaction Zn=Zn2+2eReduction reactionCu2+2e=CuDirect contact between oxidant and reducing agentZn(s)+Cu2+(aq)=Zn2+(aq)+Cu(s)Chemical energy transforms into heat energy H(298K)=-218.66kJ/molG(298K)=-212.55kJ/molVacuum bottlenergynergynergynergyThe thermometerThe solution of CuSO4Zinc powder