h traces acid, then in the presence of carbonic acid and air. These only are dissolved. metals and alloys were in the form of foil, of equal surface, In solutions of sulphate of potassa, copper, lead, brass, and namely two square inches, and of as nearly equal thickness as possible. The copper foil… … and no tia was dissolved. was dissolved, but only traces of zinc and brass. It was, as In sal ammoniac solutions, with access of air free from before, impossible to perform the experiment in the presence carbonic acid, copper was attacked prodigiously, also brass, atmospheric oxygen. German silver,…
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