Poisons, Their Effects and Detection / A Manual for the Use of Analytical Chemists and Experts

by Alexander Wynter Blyth

[63] 24·8 grms. of sodic hyposulphite, dissolved in a litre of water.

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PART IV.—ACIDS AND ALKALIES.

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SULPHURIC ACID—HYDROCHLORIC ACID—NITRIC ACID—ACETIC ACID—AMMONIA—POTASH—SODA—NEUTRAL SODIUM, POTASSIUM, AND AMMONIUM SALTS.

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I.—Sulphuric Acid.

§ 51. Sulphuric acid (hydric sulphate, oil of vitriol, H₂SO₄) occurs in commerce in varying degrees of strength or dilution; the strong sulphuric acid of the manufacturer, containing 100 per cent. of real acid (H₂SO₄), has a specific gravity of 1·850. The ordinary brown acid of commerce, coloured by organic matter and holding in solution metallic impurities, chiefly lead and arsenic, has a specific gravity of about 1·750; and contains 67·95 of anhydrous SO₃ = 85·42 of hydric sulphate.