Au Au3+ - ELECTROLYSIS SLIDE ONE OVERVIEW ANIMATION 3e- +

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Presentation transcript:

Au3+ - - - - Au3+ - ELECTROLYSIS SLIDE ONE OVERVIEW ANIMATION 3e- + THIS COULD BE A HEART CHARM BRACELET PIECE TO BE GOLD PLATED D.C. SOURCE (BATTERY) 3e- 3e- 3e- + THE CATHODE IS A CHEAP PIECE OF CONDUCTIVE MATERIAL. THIS COULD BE ANY CONDUCTIVE (METAL) IN JEWELRY TO BE GOLD PLATED. Au0 Au Au3+ - - - THE ANODE IS SOLID GOLD, THE SOURCE OF GOLD IN THIS REACTION. - + Au3+ 3e- - Au0 + THE ELECTROLYTE SOLUTION, USUALLY H2SO4

NON SPONTANEOUS OXIDATION ELECTROLYSIS SLIDE TWO NON SPONTANEOUS OXIDATION AT ANODE D.C. SOURCE (BATTERY) 3e- + Au Au3+ - - - + - The anode is solid gold, this is the source of Au(s). The DC source forces the gold to oxidize, It releases 3 electrons as it converts to a Au(III) ion, which then dissolves, the anode loses mass. An important characteristic of the electrolytic cell is that the oxidation a LESS active metal (bottom position on table J). Au0 + Au0 +  Au3+ 3e- OXIDATION AT ANODE

Au3+ - - - - - ELECTROLYSIS SLIDE THREE ELECTRON FLOW 3e- + + Au0 + D.C. SOURCE (BATTERY) 3e- 3e- 3e- THE D.C. SOURCE ACTIVLEY “PUMPS” ELECTRONS OUT OF THE ANODE CAUSING IT TO BE RELATIVLEY POSITIVE COMPARED TO THE CATHODE. THE D.C. SOURCE ACTIVLEY “PUMPS” ELECTRONS ITO THE CATHODE, CAUSING IT TO BE NEGATIVE RELATIVE TO THE ANODE. THIS HIGH DENSITY OF ELECTRONS AT THE CATHODE WILL “FORCE” A REDUCTION TO OCCUR. + Au Au3+ - - - + - - Au0 +

NON SPONTANEOUS REDUCTION AT CATHODE ELECTROLYSIS EX #1 SLIDE FOUR NON SPONTANEOUS REDUCTION AT CATHODE THE SOLID GOLD THAT WAS PRODUCED DURING REDUCTION ELECTROPLATES THE CATHODE AS SOLID GOLD D.C. SOURCE (BATTERY) 3e- 3e- 3e- + - Au0 THE GOLD(III) CATIONS MIGRATE TO THE ELECTRON RICH, NEGATIVELY CHARGED CATHODE. Au Au3+ - + Au3+ 3e- - Au0 THE GOLD(III) CATIONS MIGRATE TO THE ELECTRON RICH, NEGATIVELY CHARGED CATHODE WHERE THEY WILL BE FORCED TO BE REDUCED TO Au0 SOLID. + Au3+ 3e- Au0 +  REDUCTION AT CATHODE