We need a way to dissolve a little bit of copper from the board and get it to react with some chloride ions. This is commonly done with a mixture of hydrochloric acid and hydrogen peroxide.

Copper carbonate is green and copper oxide ... Watch this video to see how magnesium and dilute hydrochloric acid react to produce bubbles of hydrogen gas. Every chemical reaction involves a ...

A cotton swab is dipped into concentrated hydrochloric acid (producing hydrogen chloride gas) while a second on is dipped into concentrated aqueous ammonia (producing ammonia gas). Both cotton swabs ...