Nigel Baldwin | Electrolysis of silver nitrate solution DSCN0120 @nigelbaldwin3184 | Uploaded April 2018 | Updated October 2024, 5 hours ago.
High School Chemistry
Electrolysis of 0.05M silver nitrate solution
12 dc power supply
negative electrode (cathode) in the centre, graphite pencil lead
positive electrode (anode) around the outside, carbon fibre
A solid is produced around the cathode (silver) and bubbles of colourless gas (oxygen) at the anode. The silver probably oxidises as soon as it is formed.
The rapid change from black to light grey towards the end of the movie seems to occur when the power supply is interrupted (as was presumed to have occurred here), or is turned off (as observed in other experiments). The colour change is presumably due to a change in the oxidation state of the silver deposit at the cathode.
High School Chemistry
Electrolysis of 0.05M silver nitrate solution
12 dc power supply
negative electrode (cathode) in the centre, graphite pencil lead
positive electrode (anode) around the outside, carbon fibre
A solid is produced around the cathode (silver) and bubbles of colourless gas (oxygen) at the anode. The silver probably oxidises as soon as it is formed.
The rapid change from black to light grey towards the end of the movie seems to occur when the power supply is interrupted (as was presumed to have occurred here), or is turned off (as observed in other experiments). The colour change is presumably due to a change in the oxidation state of the silver deposit at the cathode.
