Sodium solution with potassium

The monofluorophosphates can be prepared by neutralization of monofluorophosphoric acid (1). Sodium monofluorophosphate [7631 -97-2] is prepared commercially (57) by fusion of sodium fluoride and sodium metaphosphate, and the potassium monofluorophosphate [14104-28-0] can be prepared similarly. Insoluble monofluorophosphates can be readily prepared from reaction of nitrate or chloride solutions with sodium monofluorophosphate. Some salts are prepared by metathetical reactions between silver monofluorophosphate [66904-72-1] and metal chlorides. 

Potassium borohydride may be prepared by reacting potassium hydroxide with sodium borohydride. The salt precipitates from an aqueous solution of sodium borohydride with addition of potassium hydroxide ... 

Potassium dichromate is obtained by reacting potassium chloride with sodium dichromate as a hot concentrated solution. The salt crystallizes when the solution is cooled ... 

Reaction of Potassium lodate with Sodium Sulphite in a Sulphate Medium. Pour 20jml of a sodium sulphite solution acidified with sulphuric acid and containing a small amount of starch into a 100-ml beaker. Pour 20 ml of a potassium iodate solution into a second 100-ml beaker. The potassium iodate solution must contain... 

Small Quantities. Wear eye protection, laboratory coat, and nitrile rubber gloves. In the fume hood, add solid potassium dichromate to a container of water (about 100 mL/5 g). Acidify with 3 M sulfuric acid (35-55 mL, pH 1 with pHydrion paper). While stirring, slowly add solid sodium thiosulfate (about 13.5 g) until the solution becomes cloudy and blue colored. Neutralize the solution with sodium carbonate. After a few minutes a blue-gray flocculent precipitate is formed. Let the mixture stand for a week or filter immediately through Celite. After a week, much of the supernatant can be decanted. The remaining liquid is allowed to evaporate or the solid filtered. The liquid may be washed into the drain. The solid residue should be washed with hot water to remove sodium sulfate, and then dried, packaged, labeled, and sent to a secure landfill site.6... 

Wear eye protection, laboratory coat, and nitrile rubber gloves. Prepare a 10% aqueous solution of the waste sodium chlorate. For each 10 mL of solution, slowly, and while stirring, add 44 mL of a 10% solution of sodium bisulfite (this allows about 50% excess of reducing agent). The continued presence of chlorate can be detected by adding, to 3 mL of the solution, a freshly prepared solution of potassium iodide (100 mg) in 3 mL of 3 M sulfuric acid (prepared by cautiously adding 0.5 mL of concentrated acid to 2.5 mL of cold water). An amber to brown color indicates the presence of chlorate. Add sodium bisulfite solution until the test is negative. Neutralize the acidic solution with sodium carbonate and discard into the drain with at least 50 times its volume of water.11 12... 

Summary Potassium chlorate is readily prepared by condensing potassium chloride with sodium chlorate in solution. After the initial mixing, the potassium chlorate is readily collected by filtration. 

This base (as the trihydrochloride) reacted with hexachloroplatinic(IV) acid to form the salt, XXXIV, in which the central nitrogen atom becomes asymmetric attempts to resolve it not unexpectedly failed as this group would almost certainly have very low, optical stability. The salt, XXXIV, when treated with silver salts, lost hydrogen chloride with the formation of the salt, XXXV. With potassium tetrachloroplatinate(II), the salt, XXXVI (X = Cl), was obtained and was more readily isolated after treatment in solution with sodium bromide or iodide as the cream-colored XXXVI (X = Br) or XXXVI (X = I), respectively. The free base reacted with aquopentamminocobaltic trichloride to give the... 

P-Fe20s has been obtained by dehydration of P-FeOOH in high vacumn at 170 °C (Braun and Gallagher, 1972). s-FeaOs ean be produced by the reae-tion of alkaline potassium ferrieyanide solution with sodium hypochlorite. It is also obtained (together with a mixture of other iron oxides) in an electric arc under an oxidizing atmosphere (Buttner, 1961). Its magnetic and thermal properties have been investigated by Dezsi and Coey (1973). 

Azoxybenzene has been prepared by reduction of nitrobenzene with alcoholic potassium hydroxide, with sodium amalgam, with hydrogen in the presence of lead oxide, with methyl alcohol and sodium hydroxide, with sodium methylate and methyl alcohol, and by electrolytic reduction by oxidation of azobenzene with chromic anhydride by treatment of /9-phenylhydroxylamine with alkaline potassium permanganate, with nitrobenzene, with mineral acids, and with mercury acetamide, and by oxidation of aniluie with hydrogen peroxide, and with acid permanganate solution in the presence of formaldehyde. The procedure described above is a slight modification of one described in the literature. ... 

This reaction is usually called the Wolff-Kishner reduction.14 In early procedures, sodium ethoxide was the base commonly employed and the reaction was carried out at about 180° in a sealed tube. A simplified technique, however, has been developed for carrying out the reaction in diethylene glycol solution with sodium o potassium hydroxide Little i lmown concerning the mechanism of the reaction, but two possibilities 14(16 are shown on p. 275. 

The acids (Figures 1 2) 95 and 99% oleic, 95% linoleic, 99% linolenic, 99% elaidic and cholic acids were obtained from chemical supply houses. Mixed rosin acids were a commercial product, Acintol R type S (2). Sodium salts of fatty acids were formed by electrometric titration of an aqueous-ethanol solution with sodium hydroxide, evaporated to dryness to remove ethanol and stored dry or as an aqueous stock solution. A sample of mixed rosin acids was assayed electrometrically with potassium hydroxide in benzene-ethanol. A stock solution was then prepared in water from a weighed quantity of Acintol R and the amount of sodium hydroxide calculated from the assay. Other materials were reagent grade chemicals. 

Potassium cyanide solution (POISON) after first alkalizing the test solution with sodium hydroxide and adding potassium cyanide, thiocyanate ions are formed on boiling ... 

Transfer the distillate to a small separatory funnel, add 2-3 g of potassium carbonate, and then carefully saturate the solution with sodium chloride avoid adding more sodium chloride than will dissolve readily. If a second layer forms at this point, do not separate it, but continue with the extraction. Extract the mixture sequentially with two 10-mL portions of dichloromethane and combine the extracts. Dry the organic extracts over several spatula-tips full of anhydrous sodium sulfate. Swirl the flask occasionally for a period of 10-15 min to facilitate drying add further portions of anhydrous sodium sulfate if the solution does not become clear. 

In positive ESTMS, some molecular species can form adducts with alkali cations (sodium and potassium). In particular, potassium adducts are typical of raw herbal samples, because vegetable matrices are rich in potassium salts. Alkali adduct formation may be diminished by desalting the samples through solid phase extraction (SPE). Diluting the sample solutions is a simple way to replace potassium ions with sodium ions. The latter are the most common in commercial extracts of herbs. 

Schnitzer s green by treating an aqueous solution of potassium dichromate with sodium phosphate and tartaric acid (Zetr and Riibencamp, 1906). 

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