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1

It makes no difference; but, if the food is wet and has salt or is acidic it will corrode through in a matter of hours (at ambient temperature, not if immediately frozen). The different appearance is because the final rolling is done with 2 layers of foil. One side of each sheet contacts the polished steel roller, the other side faces the second sheet of ...


1

Non-amalgamation of mercury with iron means that the iron is not dissolved, and therefore floats on the surface as a dross. However, non-amalgamation does not mean total insolubility. If a few ppm of iron needs to be removed, washing with a dilute solution of HNO3 might be best, with much agitation. There will be some dissolution of mercury to Hg++. That's ...


0

Back when I was in my final year of high school, the subject of our major chemistry assignment was Aluminium. I remember the class being taken on a tour of an enormous aluminium factory, where we stood overlooking the massive rolls of aluminium and the successive stages it went through during production. I distinctly recall the foreman/guide telling us ...


0

Several decades ago I used a lot of mercury (in polarography with a dropping mercury electrode) and purified it by distillation in a still looking something like this https://www.researchgate.net/figure/Distillation-apparatus-for-mercury-cells-a-and-design-b-del-Campo-et-al-2008_fig1_325075540 However, mercury is toxic, especially in vapour, I strongly ...


8

As iron is one of few metals not forming amalgams, Almost all metals can form amalgams with mercury, the notable exceptions being iron, platinum, tungsten, and tantalum. ..it should preferably contaminate the mercury surface. I would try, perhaps repeated, dropping mercury, e.g via punched filtration paper to sulphuric acid bath. It can be combined ...


3

One barrier is the greater tendency of lithium to form partially covalent bonds than heavier alkali metals. This is a good thing for organic chemists, since this stabilizes organolithium compounds and enhances the solubility of lithium chloride as a chloride ion source (see this answer). But it's not so hot for forming lithides. Covalent bonding to more ...


10

You can combine materials in two ways: chemically and mechanically. On average, if you want to the desired physical properties to add up, you want to go mechanical way, not the chemical one. Once the reaction takes place, the there is absolutely no reason to assume the product preserves properties of both precursors. It might sometimes, but more often than ...


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