Calcium hydroxide reaction with ammonium

OC-Hydroxycarboxylic Acid Complexes. Water-soluble titanium lactate complexes can be prepared by reactions of an aqueous solution of a titanium salt, such as TiCl, titanyl sulfate, or titanyl nitrate, with calcium, strontium, or barium lactate. The insoluble metal sulfate is filtered off and the filtrate neutralized using an alkaline metal hydroxide or carbonate, ammonium hydroxide, amine, or alkanolamine (78,79). Similar solutions of titanium lactate, malate, tartrate, and citrate can be produced by hydrolyzation of titanium salts, such as TiCl, in strongly (>pH 10) alkaline water isolation of the... 

Reactions of the Side Chain. Benzyl chloride is hydrolyzed slowly by boiling water and more rapidly at elevated temperature and pressure in the presence of alkaHes (11). Reaction with aqueous sodium cyanide, preferably in the presence of a quaternary ammonium chloride, produces phenylacetonitrile [140-29-4] in high yield (12). The presence of a lower molecular-weight alcohol gives faster rates and higher yields. In the presence of suitable catalysts benzyl chloride reacts with carbon monoxide to produce phenylacetic acid [103-82-2] (13—15). With different catalyst systems in the presence of calcium hydroxide, double carbonylation to phenylpymvic acid [156-06-9] occurs (16). Benzyl esters are formed by heating benzyl chloride with the sodium salts of acids benzyl ethers by reaction with sodium alkoxides. The ease of ether formation is improved by the use of phase-transfer catalysts (17) (see Catalysis, phase-thansfer). 

The Solvay process involves a series of partial reactions. The first step is calcination of calcium carbonate to form lime and CO2. Lime is converted to calcium hydroxide. The most crucial step of the process involves reacting brine solution with carbon dioxide and ammonia to produce sodium bicarbonate and ammonium chloride. Sodium bicarbonate converts to sodium carbonate. The calcium hydroxide and ammonium chloride react to form calcium chloride as the by-product. The partial reactions are shown below ... 

Bassam Z. Shakhashiri, "Preparation and Properties of Ammonia/ Chemical Demonstrations, A Handbook for Teachers of Chemistry, Vol. 2 (The University of Wisconsin Press, Madison, 1985), pp. 202-204. Ammonia gas is produced from the reaction of ammonium chloride with calcium hydroxide and is collected in an Erlenmeyer flask by the displacement of air. The ammonia gas turns moistened litmus paper blue, demonstrating the basic properties of ammonia dissolved in water. When the mouth of an ammonia-filled Erlenmeyer flask is placed below the surface of a pool of water, water rapidly enters the flask to replace ammonia that dissolves in the water. White smoke forms when ammonia vapor is passed over the top of a beaker of concentrated hydrochloric acid forming solid ammonium chloride. 

According to Goekel,22 this reaction takes place in the following manner Dry ammonium nitrate reacts with calcium hydroxide present in the crude calcium cyanamide to give calcium nitrate, water, and ammonia. The ammonia and water do not escape but are absorbed by the calcium nitrate to give a mixture of hydrated and ammonated salt and also by the ammonium nitrate which is ammono-deliquescent (Diver s solution). These substances melt below 100°C. and provide a solvent in which the reaction between calcium cyanamide and ammonium nitrate may take place. 

Carbon dioxide and the ammonia recovered by treating the ammonium chloride formed with calcium hydroxide are returned to the process cycle. Ammonia is therefore only a reaction-aid. The overall reaction is ... 

The titration of calcium and magnesium with EDTA is done at pH 10, using an ammonia-ammonium chloride buffer. The pH must not be too high or the metal hydroxide may precipitate, causing the reaction with EDTA to be very slow. Calcium can actually be titrated in the presence of magnesium by raising the pH to 12 with strong alkali Mg(OH)2 precipitates and does not titrate. 

ACIDE CHLORHYDRIQUE (French) (7647-01-0) Hydrogen chloride gas is quickly absorbed in water, forming hydrochloric acid. Hydrochloric acid is a strong acid. Violent reaction with bases, strong oxidizers (with release of chlorine gas), acetic anhydride, cesium cyanotridecahydrodecaborate(2-), ethylidine difluoride, hexalithium disilicide, metal acetylides. sodium, silicon dioxide, tetraselenium tetranitride, and many organic materials. Incompatible with aliphatic amines, alkanolamines, alkylene oxides, aluminum, aluminum-titanium alloys, aromatic amines, amides, 2-aminoethanol, ammonia, ammonium hydroxide, calcium phosphide, chlorosulfonic acid, ethylene diamine, ethyleneimine, epichlorohydrin, isocyanates, metal acetylides, metal carbides, oleum, organic anhydrides, perchloric acid,... 

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