hillzabilly wrote:unless it was something like citrus vodka that had some acid that may react to it
I think you've got this wrong, bro. High school Chemistry teaches us that copper is a metal and will react with any acidic liquid! Perhaps I'm misunderstanding your statement...?db1979 wrote:Copper is inert to acid so no problem with an acidic spirit.
db1979 wrote:High school chem teacher here.
Acid/metal reactions can be considered a corrosion reaction between two different metals. Hydrogen is not often considered a metal but it is on the metal side of the periodic table and is included in the reduction potentials of all metals - it's actually the one that all other metals are standardised off.
Anyway corrosion can occur between different metals in contact with each other. Hydrogen is a more reactive metal than copper and since the reactive part of acids are hydrogen ions (think of them as hydrogen that is already reacted) then acids will react with all metals that are more reactive than hydrogen. Copper is less reactive than hydrogen and will not react. The oxide of copper is a different story since it is quite reactive and weak acids like vinegar and citric acid will dissolve it, leaving metallic copper.
Kenster wrote:DB, as a sideline... where the sulphide converts to (Cu) sulphate, will probably explain to a degree where queries have been raised regarding 'bluey tinges' in product. Makes sense to me... sulphur excess in wash converting to CuSO4... Also stands to reason that the copper is thinning in this environment, ever so slowly.
Kenster wrote:db... thanks for the explanation, was just a thought. CuSO4 = blue..not so much...My high school Chem was 45 years ago, i am surprised i remember anything at all.Good to have a bloke with some chemistry between his ears on the site...cheers.
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