As to the content of the stomach: I apologize, that sulphuric acid in the stomach was maybe some trash. I shall see what happenes in the stomach exactly. But: I still consider the silver to be pretty reactive: 1. When you leave it on the air, it turns black within some days. It´s the matter of the hydrogen sulphide content in the air and silver sulphide appears on the silver surfaces. This, maybe is also answer to that, why sometimes the electrodes turn dark during the batch process. I suppose, that dissolved gasses in the DW can react with the electrode surface. As I was informed, the best way to get out the gasses from the DW is to boil it shortly before starting the batch. Can I ask somebody who faces this problem with the electrodes colour change to try this if it works ?????????????? 2. Ocassionaly I work with plated silver material and if even I touch it with my hand, an exact fingerprint turns dark in several minutes on the silver surface. So, I must handle it wearing gloves. There are some chemicals in the sweat, that silver reacts with almost instantly. It seems, as if it is developed photographic image of my fingerprints. 3. As to the reactions with the acids, as below: It is true, there is no reaction with the hydrochloric acid. If you pour sulphuric acid over silver plate, there is but a slight reaction, where the silver sulphate appears covering the whole surface and as it is not soluble, it makes passivating (= insulating) layer over the silver. Thus the more reaction is suppressed, the silver surface is "passivated". In case of CS might the situation be quite different... As to the fuming nitric, the silver dissolves absolutely in violent reaction, with the sulphur nitrate resulting from this reaction. I have asked for the above information my friend - he´s chemist. So the answer to the Peter´ s question is: It was fuming nitric what violated your silver chain. Pavel H.
Marshall Wrote silver is one of the most inert metals there is, it is slightly more reactive than gold, but not much. You can drop it into fuming nitric, sulfuric and hydrochloric acids (independently) and nothing happens. Marshal: As a child once I try to clean a silver chain in an Ounce of the acid tinners use to solder. The chain completely dissolved after a few minutes. What kind of acid do You think it was? Peter R -- The Silver List is a moderated forum for discussing Colloidal Silver. Instructions for unsubscribing are posted at: http://silverlist.org To post, address your message to: silver-list@eskimo.com Silver List archive: http://escribe.com/health/thesilverlist/index.html Address Off-Topic messages to: silver-off-topic-l...@eskimo.com OT Archive: http://escribe.com/health/silverofftopiclist/index.html List maintainer: Mike Devour <mdev...@eskimo.com>
