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Question:

Reaction of copper and nitric acid. Please Help!?

If copper and nitric acid react, why is it more dangerous if the acid spilled onto thin copper pipes rather than thick copper bars?Also - Water was sprayed onto the copper and nitric acid to slow down the reaction. Why does this slow down the reaction?10 points for best answer!Thanks!

Answer:

well I'm only 13 8-) though, water helps slow down the reaction because adding water makes it more dilute - slowing down the reaction. )
Any acid would react with copper, however different products would occur each time, and the rate of reaction may vary.
if its spilled onto thick copper bars, there's less surface area for nitric acid to react on. so when spilled onto thin copper pipes, its more surface area so nitrogen dioxide will be produces at a faster rate. when water is sprayed, it dilutes it and there is the same amount of H+ ions in a greater volume of solution. its all got to do with surface area and concentration :)
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