Raw Silver cemented on copper film🙂

[Proffshuggarn]

I don't know if it's relevant, but I thought I could contribute a time-lapse movie of a silver cementation on copper I did this summer, which was one of the first I filmed.
Unfortunately, there was some free nitric left in the silver nitrate, which meant that the cementation wasn't entirely optimal, cause it made the silver go back in the solution, but you learn something new almost every time in the lab
/Dennis

 

[Hill-13]

Seems like it happens tome also

 

[Alan]

Awesome video thanks for sharing!

 

[Proffshuggarn]

Awesome video thanks for sharing!

Thanks Alan
At least it gives a good view of what happens when it’s free nitric left in the solution and some of the silver goes back into the solution
/Dennis

 

[WestTexasGold]

Great video, Profshuggarn! It's interesting to see the silver going back into the solution. Do you think this affects the overall efficiency of the cementation process? Thanks for sharing this experiment.

 

[Proffshuggarn]

Great video, Profshuggarn! It's interesting to see the silver going back into the solution. Do you think this affects the overall efficiency of the cementation process? Thanks for sharing this experiment.

Thanks @WestTexasGold
In answer to your question about excess nitric in the silver nitrate solution affecting the cementation overall, so both yes and no.

What I should have done before starting the cementation was that I should have added a few grams of metallic silver extra, which would have consumed the remaining nitric.

Although the best thing is to be more careful than I was in this case, by calculating how much nitric is needed based on the weight of the silver and approximately counting in any base metals.
And to add nitric in small doses at a time and keep an eye on the reaction.

It takes 1.2ml nitric/gram silver and 4ml nitric/gram copper (the most common base metal in contacts). And of course you should first add distilled water before nitric. About 1.2ml distilled water per gram silver and 4ml per gram estimated copper. (Correct me if I'm wrong in that information).
/Dennis