Just got a new '11 GTI and trying to teach my GF a stick shift â on the hills of SF. She's been stalling the car quite a lot.
Answers. Best Answer: Copper Nitrate forms blue crystals which dissolve in water. Transition metal salts often form colored crystals. Since the other reaction product is metallic silver precipitate, and everyone knows what silver looks like, the blue is from the copper nitrate by process of elimination.The original solution was not blue because silver nitrate is colorless/slight gray when in solution and Cu(s) is just copper metal.ince the other reaction product is metallic silver precipitate, and everyone knows what silver looks like, the blue is from the copper nitrate by process of elimination.
Remove the cleaned penny from the liquid and let it sit for an hour. The residue that is on the copper surface promotes a reaction between the copper and the oxygen in the air. The resulting blue-green copper oxide is a tarnish that forms called patina. These are copper minerals that are observed in nature.Green patina forms when a shiny copper penny is removed from the salt/vinegar solution.e can take the solution that we have been cleaning the copper pennies and coat a nickel nail with copper metal. The reaction is: Check with the Table of Activity of Metals 1  : Reaction 3 is observed because nickel is higher up on the activity series of metal than copper.