A Manual of Chemical Analysis: Qualitative and Quantitative, for the Use of Students, Part 1

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Reeve, 1864 - Analytical chemistry - 663 pages
 

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Page 225 - ... that a body plunged in a fluid loses as much of its weight as is equal to the weight of an equal volume of the fluid.
Page 591 - Weigh an exact imperial half-pint of the soil in any state of dryness. When this weight is multiplied by 150 it will give very nearly the weight of a cubic foot of the soil in that state. 2. Chemical Analysis. The accurate and complete quantitative analysis of soils is a work of some difficulty, and cannot be entirely accomplished by volumetric means. Many of the principal substances, however, may be estimated in this manner, and the following method of procedure is given as the most convenient :...
Page 503 - ... nitrate of potassa are formed, the bromide of potassium and chloride of sodium remaining undecomposed. When bromide of potassium is poured upon chloride of silver, an entire decomposition ensues, bromide of silver and chloride of potassium being produced. When iodide of potassium is added to chloride of silver, iodide of silver and chloride of potassium are formed ; and when iodide of potassium is added to bromide of silver, there is a similar decomposition, the iodine replacing the bromine....
Page 227 - ... once what is the weight of a quantity of water, equal in bulk to the solid matter in the sand ; and by comparing this with the weight of the sand, we have its true specific gravity.
Page 427 - In estimating or expressing the fineness of gold, the whole mass spoken of is supposed to weigh twenty-four carats of twelve grains each, either real, or merely proportional, like the assayer's weights ; and the pure gold is called fine. Thus, if gold be said to be 23 carats fine, it is to be understood, that in a mass weighing 24 carats, the quantity of pure gold amounts to 23 carats.
Page 323 - The method is based on the well-known reciprocal action of chromic acid and protoxide of iron, whereby a transference of oxygen takes place, the protoxide of iron becoming converted into sesquioxide and the chromic acid into sesquioxide of chromium.
Page 624 - The quantity of potass is determined by means of chloride of platinum in the usual way ; and that of the soda is calculated from that of the chloride of sodium, indicated by deducting the weight of the chloride of potassium from that of the mixed alkaline chlorides.
Page 417 - ... to expel the sulphur at the lowest possible temperature. If a strong heat be given at the commencement, white fumes of oxide escape, especially when the air has free access. The higher sulphuret of tin has the property of subliming somewhat at certain temperatures ; the vapours are oxidized by contact with the air, and form oxide of tin.
Page 445 - Play fair, is to employ it not only as a direct test for alkaline sulphurets, but as an indirect one for sulphur in any of its compounds. Any substance containing sulphur will yield an alkaline sulphuret if heated with carbonate of soda, either with or without the addition of carbonaceous matter, according as a deoxidizing action is or is not required. The...
Page 623 - Its separation from the fluid is assisted by gently heating, it is then well washed upon a filter with hot water, ignited and weighed.» To the filtered solution neutral oxalate of ammonia is added as long as a precipitate is formed, and the quantity of lime is determined in the usual manner. When it has been shown by the qualitative analysis, that besides phosphate of iron, the ash contains peroxide of iron or oxide of manganese (in which case the presence of earthy phosphates is very rarely detected,)...

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