Redox And Electrochem Flashcards
Redox
Reduction and oxidation
Reduction
Gaining electrons
Oxidation
Loosing electrons
In a reduction rxn what side are the electrons on
Product side (left)
In a oxidation rxn what side are the electrons on
The products side (right)
Hydrogen is usually what oxidation state
+1 unless it is with a G1 or G2 then it is -1 (metal hydrides)
Oxygen is usually what oxidation state
-2 except when it is with OF2 then it is +2
When it is with peroxide then it is -1 (H2O2) (NA2O2)
Oxidation agent
Element going through reduction
Electrochemical cell - voltaic cells- Galvonic cell
Spontaneous reaction that produces electricity
Exothermic reaction
Chemical nrg is converted to electrical
Eo= cell potential (positive)
Anode for voltaic/ Galvonic/ electrochemical cell
Where oxidation occurs (negative end)
Loosing electrons
Cathode for voltaic/ Galvonic/ electrochemical cell
Where reduction occurs (positive end)
Gaining electrons
Electrolytic cell- electrolysis- electroplating (metal plating)
Non spontaneous redox rxn
REQUIRES electricity
FORCED redox rxn
Endothermic - energy is absorbed
Eo= cell potential (negative value)
Anode for electrolytic cell
Where oxidation occurs (positive end)
Loosing of electrons
Cathode for electrolytic cell
Where reduction occurs
Negative end
Gaining electrons
