 | John Eddowes Bowman - 1856 - 320 pagina’s
...hydrosulphuric acid (HS) is given off, which may be recognized by its odor: or by putting into the tube a strip of paper moistened with a solution of acetate of lead, which will be blackened, owing to the formation of sulphide of lead (PbS) (438). SECTION II. Phosphoric... | |
 | Josiah Parsons Cooke (Jr.) - 1870 - 568 pagina’s
...containing S02 a small amount of hydrochloric acid with a few pieces of zinc. The .fl^ may be detected by a strip of paper moistened with a solution of acetate of lead, and the reaction gives us the means of discovering small quantities of S02. Sulphurous anhydride is... | |
 | William Dittmar - 1876 - 402 pagina’s
...gas, eg air, are best detected by its smell, and by its tarnishing action on metallic silver or on a strip of paper moistened with a solution of acetate of lead or of sulphate of copper. Silver or mercury salts are not so well adapted for the purpose, because... | |
 | Josiah Parsons Cooke (Jr.) - 1879 - 618 pagina’s
...containing S03a, small amount of hydrochloric acid witli a few pieces of zinc. The JI^S may be detected by a strip of paper moistened with a solution of acetate of lead, and the reaction gives us the means of discovering small quantities of S03. Sulphurous anhydride is... | |
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The .fl^ may be detected by a strip of paper moistened with a solution of acetate of lead, and the reaction gives us the means of discovering small quantities of S02. Sulphurous anhydride is a powerful reducing agent. Thus IodicAcid 