. Journal. A cooling arrangement protects the packingof the lid from getting destroyed. The carbonic acid On the Solution of Magnesium Carbonate by Carbonic Acid. E. Engler. Compt. Rend. 100, estimating the solubility of magnesium carbonate inwater at 12° C, charged with carbonic acid at variouspressures, the author has obtained numbers from whichhe calculates the general equation X-=ky (where y =quantity dissolved, X— pressure of CO- and k = a con-stant = -03S14); Kence X = k3y3 or y = i ZJ X, that is to say, the quantity dissolved at any fixed temper-ature is proportional to the cube
. Journal. A cooling arrangement protects the packingof the lid from getting destroyed. The carbonic acid On the Solution of Magnesium Carbonate by Carbonic Acid. E. Engler. Compt. Rend. 100, estimating the solubility of magnesium carbonate inwater at 12° C, charged with carbonic acid at variouspressures, the author has obtained numbers from whichhe calculates the general equation X-=ky (where y =quantity dissolved, X— pressure of CO- and k = a con-stant = -03S14); Kence X = k3y3 or y = i ZJ X, that is to say, the quantity dissolved at any fixed temper-ature is proportional to the cube root of the carbonicacid pressure.—A. G. G. A Crystallised Hydrate of Phosphoric Acid. A. Rend. 100, 447. By cooling the mother-liquor from the trihydrate,prismatic plates of a tetrahydrate (P,Os+4HaO) crys-tallise out. This melts at 2V C, its heat of liquefactionbeing 364cals. It dissolves in less than lOOpts. of waterwith absorption of heat, in more water with evolution ofheat.—A. G. given off travels through a cooling vessel J, where thesteam is condensed and collects in the cylinder it proceeds through two coke-towers, which serveto retain any organic matter, and lastly into the cylinderS, surrounded by cold water or ice. This cylinder isfastened to the beam of a scale for the purpose of fillingit with any definite weight desired. The coke-towersstand in a vessel which can be filled with warm water inorder to prevent the carbonic acid from being condensedin this part of the apparatus.—S. H. Vn the Law of Solution. 11. le Chatelier. Compt. Rend. 100, 50 and s tin first of these communications, the author deducesfrom tlic principles of thermodynamics a relation between the solubility of salts, their heat of solution and the temperature. From this equation it is shown that thesolubility of a salt which dissolves with absorption ofheat, will increase with the temperature and inversely;whilst the solubility of a salt which dissolves withev
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
