how much nitric acid to dissolve 1kilo of copper wire

[arthur kierski]

please,help me --- 3cu+8hno3=3cu(no3)2+2no3---thank you for replies

 

[arthur kierski]

i for lazyness,asked for the help---but by using basic chemistry,i found the answer for the question asked by me---thanks anyhow for reading the thread--regards to all

 

[anachronism]

Nice, however can I ask the context Arthur?

Jon

 

[mausolfe]

1kg Cu = 1000 g
Formula weight Cu = 63.546 g

Mols Cu = 1000 g / 63.546 g = 15.74 mols Cu

Reaction
Cu + 2 HNO3 —>. Cu(NO3)2 + NOx (waste/excess)

Minimum HNO3
2x15.74 mols ~ 31.5 mols required

Concentrated HNO3 ~ 70%
Mols / L ~15.1M = mols/L

31.5 / 15.1 ~ 2L concentrated nitric acid is required

The reaction will generate significant quantities of NOx

Be careful

 

[anachronism]

Sure, use a sealed reaction vessel with a condenser and lab conditions and it would come close but in the "real world" it's a fair bit more. That's a stoichiometric calculation. The reality is different because other factors come into play.

 

[mausolfe]

Correct - if added slowly to the Cu, I would think you could slow degassing.

Capturing the gases in NaOH may be a good idea

 

[mausolfe]

Also, I feel that if you’re going to do it, you should be doing it in a safe and controlled environment.

No amount of metal recovered is worth not doing it right - costs to the environment and human/animal impact is too great using traditional methodologies.

Closed cycles for mining is the future

When considering costs, investment in the right equipment lowers production costs and improves long-term financial sheets.

Just my opinion