Manual of qualitative analysis / by Robert Galloway.

  • Galloway, Robert.
Date:
1861
Catalogue details

Licence: Public Domain Mark

Credit: Manual of qualitative analysis / by Robert Galloway. Source: Wellcome Collection.

    42/272 (page 24)
    Dilute one part of the concentrated solution with five parts of water. 33. Sulphate of lime (gypsum).—Dissolve as much of the salt as the water will take up. 34. Sulphate of magnesia (Epsom salts).—Dissolve one part in eight of water. 35. Perchloride (sesquichloride) of iron is prepared by dissolving recently precipitated and well-washed peroxide of iron in hydrochloric acid. It must not contain any free acid. 36. Acetate of lead.—Dissolve one part, by weight, of the salt, in ten parts, by measure, of water. 37. Subnitrate of mercury is made by heating gently in a small flask nine parts of nitric acid in conjunction with ten parts of mercury, until the disengagement of nitrous fumes ceases; the solution is then boiled for some time with the undissolved portion of the mercury, care being taken to replace the water lost by evaporation. The crystals, which separate on the cooling of the liquid, are dissolved in twenty parts of cold water, slightly acidulated with nitric acid. The fluid is then filtered, if necessary, and the filtrate kept in a glass bottle, the bottom of which is covered with mercury. 38. Chloride of mercury.—Dissolve one part of the salt in sixteen parts of water. 39. Sulphate of copper.—Dissolve one part of the pure erystallized sulphate in ten parts of water. 40. Nitrate of silver.—Dissolve one part, by weight, of the salt, in twenty parts, by measure, of water. 41. Nitrate of cobalt.—Dissolve one part in ten parts of water. 42. Solution of indigo.—Heat one part of indigo, in powder, with six parts of fuming sulphuric acid. For use,