« first day (3513 days earlier)      last day (157 days later) » 

1:36 PM
2
Q: Why do diluted sulfuric acid and hydrogen peroxide etch copper only when chloride ions are present?

Jonathan S.I've mixed 30ml 10% sulfuric acid with 20ml 3% hydrogen peroxide and put a drop of this solution onto copper foil. The solution quickly removed the oxide layer from the copper but did not dissolve it any further within the hour that I left the drop on the copper. When I wiped the solution off wit...

 

« first day (3513 days earlier)      last day (157 days later) »