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gen chem

redox

QuestionAnswer
_____ loss of electron oxidation
OIL RIG oxidation is loss electrons Reduction is gain electrons
oxidation of free atoms like H2 0
oxidation of monoatomic ion NA+ = charge of ion
oxidation of Grp 1 and grp 2 elements +1 and +2
oxidation of grp VII -1
oxidation of H -1 with less electroneg elements +1 with more electroneg elements
oxidation of O -2 +2 with more electroneg elements -1 in peroxides (o-o) or BaO2
balancing redox rxns in acidic soln we add H2O i basic soln we add OH
for electrodes AN OX RED CAT anode - oxidation Reduction at cathode
galvanic cells/ Daniel cell/battery have _______ rxn spontaneous - forms electric energy -G
electrolytic cells have ________ rxn nonspontaneous - uses electrical energy
flw of electrons in daniel cell anode (abundance of electrons cuz its where oxidation occurs) to cathode
in electrolytic cells the anode positive
in electrolytic cell the cathode negative
in galvanic cell the anode negative
in galvanic cell the cathode positive
reduction potential E* tendency to become reduced
more positive E_______ greater tendency to be reduced
Tl+ + e- ----> Tl(s) E= -.34 oxidized therefore Tl(s) oxidized to Tl+ E=+.34
standard emf of galvanic cell is positive
standard emf of electrolytic cell is negative
gen formula emf E red + E oxid
G is negative when emf is positive
more negative E greater tebdency to be oxidzed
Sm3+ + Rh +6Cl- ----> [RhCl6]^3- + Sm Sm3+= -2.41 [RhCl6]^3= +.044 wats the EMF?? determine oxidation and reduction of half rxn the more positive would be reduced the more negative would be oxidized for the oxidized reverse the sign to positive and flip the eqn then add the emfs =-2.85
if the redox and the emf have different results the E is going to be negative and an electrolytic cell therefore nonspontaneous
Created by: smuttz
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