Potassium hydrocarbonate

Cone. soln. of sodium hypochlorite with up to 42 per cent, of available chlorine have been made under the trade name chloros, by passing chlorine into a soln. of caustic soda of such a strength that the sodium chloride which is formed separates out. The temp, is kept below 27°. The crystals of sodium chloride are removed, and more chlorine is introduced, but the sodium hydroxide is always kept in excess or the soln. will be unstable. A. J. Balard prepared potassium, sodium, and lithium hypochlorites by neutralizing a well-cooled soln. of the base with the acid. E. Soubeiian evaporated in vacuo the liquid obtained by treating a soln. of calcium hypochlorite with sodium carbonate, and obtained, before the liquid had all evaporated, crystals of sodium chloride and of sodium hypochlorite. P. Mayer and R. Schindler obtained solid potassium hypochlorite mixed with potassium hydrocarbonate by the action of chlorine—developed from 10 parts of sodium chloride—on a soln. of 24 parts of potassium hydrocarbonate and one of water. 

Potassium carbonate cannot be made economically by Solvay s process because the potassium hydrocarbonate is too soluble but if trimethylamine be used in place of using ammonia, J. Ortlieb and J. A. Muller have shown that potassium hydrocarbonate will be precipitated.5 A great deal of the potassium carbonate of commerce is made by N. Leblanc s process. 

KHC03a(J+22-0 Cals. and K2C03aa+C02aa=2KHC02a(1-j-l-8 Cals. For the heat of solution of potassium hydrocarbonate, M. Berthelot gives —5"3 Cals. 

C. L. Berthollet, and J. J. Berzelius 11 found that when an aq. solji. of potassium hydrocarbonate is boiled, and then cooled, crystals of potassium sesquicarbonate... 

The properties of ammonium hydrocarbonate.—Ammonium hydrocarbonate occurs in the form of a powder, in transparent or opalescent crystals, and in translucent crystalline masses. The crystals have been measured by H. Rose, W. H. Miller, H. St. C. Deville, C. F. Rammelsberg, F. Riidorff, etc. they belong to the rhombic system, and have the axial ratios a b c— 0 6726 1 0 3998. H. Rose claimed to have once made monoclinic crystals of ammonium hydrocarbonate, isomorphous with the potassium salt, by evaporating a soln. of the normal salt in vacuo, but this observation has not been confirmed. In his 1852 paper, H. St. C. Deville stated that he believed that he had prepared crystals of the hydrocarbonate belonging to a different system to the ordinary salt, but in his 1854 paper he attributed little weight to this observation, and stated only one hydrocarbonate exists, but since the crystalline form of this salt is not isomorphous with the corresponding potassium hydrocarbonate, he stated that both these salts will prove one day to be dimorphous, implying that the unknown form of the one carbonate will prove to be isomorphous... 

Potassium phosphate monobasic Magnesium sulfate heptahydrate Calcium chloride dihydrate Zinc sulfate heptahydrate Ferric sulfate heptahydrate Copper sulfate pentahydrate Cobalt(II) chloride hexahydrate Perchloric acid Potassium hydrocarbonate... 

Potassium hydrocarbonate Potassium iodide Sodium methoxide... 

The crystals of sodium and potassium hydrocarbonates are mono clinic prisms. According to J. Schabus, the crystals of sodium hydrocarbonate, NaHCOa, have the axial ratios a h c=0 7645 1 0 3582, and =93° 19 and, accor ng to... 

H. J. Brooke, the crystals of potassium hydrocarbonate, KHCO3, have... 

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