Sodium, dissolving

Benzoyl piperidine. In a 1-litre three-necked flask, equipped with a mechanical stirrer, separatory funnel and a thermometer, place 85 g. (99 ml.) of redistilled piperidine (b.p. 105-108°) and a solution of 53 g. of sodium hydroxide in 400 ml. of water. Stir the mixture and introduce during the course of 1 hour 140 g. (115-5 ml.) of redistilled benzoyl chloride maintain the temperature at 35-40°, Cool to room temperature and extract the benzoyl piperidine with ether. Wash the ethereal solution with a little water to remove any dissolved sodium hydroxide, and dry with anhydrous potassium carbonate. Remove the ether on a water bath and distil the residue under diminished pressure (Fig. II, 20, 1). Collect the benzoyl piperidine at 184—186°/15 mm. it is an almost colourless viscous liquid and crystallises on standing in colourless needles m.p. 46°. The yield is 170 g. 

When dissolved ia water, the solution is identical with that obtained by dissolving sodium carbonate ia aqueous hydrogen peroxide. There is some evidence for the presence of the traces of tme peroxocarbonate anion, HCO , ia these solutions (95). If the peroxohydrate is heated for about an hour at 100°C and then allowed to cool to room temperature, some decomposition occurs and the product effervesces when placed ia water. Electron spia resonance experiments (64) iadicate that free radicals are present ia this partially decomposed material, but the nature of these radicals is obscure. 

Barium nitrate is prepared by reaction of BaCO and nitric acid, filtration and evaporative crystallization, or by dissolving sodium nitrate in a saturated solution of barium chloride, with subsequent precipitation of barium nitrate. The precipitate is centrifuged, washed, and dried. Barium nitrate is used in pyrotechnic green flares, tracer buUets, primers, and in detonators. These make use of its property of easy decomposition as well as its characteristic green flame. A small amount is used as a source of barium oxide in enamels. 

A proposal for a draft standard on the requirements for the internal cathodic protection of fuel tanks has been put forward by a working party entitled Internal cathodic protection of fuel tanks [18]. This contains the following information an electrolyte is produced by dissolving sodium bicarbonate in drinking water with a resistivity not greater than 2000 Q cm. The solution should completely cover the anodes in the tank. 

BS EN 14911 dissolved sodium lithium ammonium, potassium, manganese, calcium, magnesium, strontium, barium ion chromatography... 

Water is a very poor conductor of electricity. Yet when sodium chloride dissolves in water, the solution conducts readily. The dissolved sodium chloride must be responsible. How does the dissolved salt permit charge to move through the liquid One possibility is that when salt dissolves in water, particles with electric charge are produced. The movement of these charged particles through the solution accounts for the current. Salt has the formula, NaCl—for every sodium atom there is one chlorine atom. Chemists have... 

Sodium tetrahydroborate (III) (sodium borohydride ), 1 per cent w/v. Dissolve sodium hydroxide pellets (5.0g) in 300 mL of de-ionised water and cool. Add sodium tetrahydroborate(III) (5.0 g) directly to the sodium hydroxide solution and make up the total volume to 500 mL with de-ionised water. Shake the solution thoroughly and filter through a Whatman No. 541 filter paper. (The resulting solution is stable for at least one week.)... 

Ionic polysulfides dissolve in DMF, DMSO, and HMPA to give air-sensitive colored solutions. Chivers and Drummond [88] were the first to identify the blue 83 radical anion as the species responsible for the characteristic absorption at 620 nm of solutions of alkali polysulfides in HMPA and similar systems while numerous previous authors had proposed other anions or even neutral sulfur molecules (for a survey of these publications, see [88]). The blue radical anion is evidently formed by reactions according to Eqs. (5)-(8) since the composition of the dissolved sodium polysulfide could be varied between Na2S3 and NaaS with little impact on the visible absorption spectrum. On cooling the color of these solutions changes via green to yellow due to dimerization of the radicals which have been detected by magnetic measurements, ESR, UV-Vis, infrared and resonance Raman spectra [84, 86, 88, 89] see later. 

Figure 4. Graphs of fluorescence quantum yield and phosphorescence quantum yield ( ) versus log of the ratio of millimoles of dissolved sodium acetate to millimoles of p-aminobenzoic acid anion. (Reproduced from reference 12. Copyright 1988 American Chemical Society.)...

C03-0094. A mildly antiseptic mouthwash can be prepared by dissolving sodium chloride in water, (a)... 

As one example, dissolving sodium acetate in a solution of acetic acid produces a buffer solution in which both acetic acid and acetate anions are major species. Example describes an acetic acid-acetate buffer solution. 

To make a buffering solution, ethanoic acid is added to the dissolved sodium ethanoate. Because the ethanoic acid is a weak acid, it does not ionize completely. However, it does release hydrogen ions, some of which react with the ethanoate ions to form more ethanoic acid. The solution now contains a lot of ethanoate ions and enough hydrogen ions to make it acidic. 

Lee, Y., 1968, Pool-Boiling Heat Transfer with Mercury and Mercury Containing Dissolved Sodium, Int. J. Heat Mass Transfer 77.1807. (2)... 

Currently the most suitable system, that will generate potentials up to -1050 mV, is the iron-triethanolamine complex prepared from either iron(II) or iron(III) salts. Using iron(III) sulphate penta- or hexahydrate, for example, dyebaths are prepared by first dissolving sodium hydroxide in a small amount of water, to which is added the triethanolamine. Hydrated iron (III) sulphate is separately dissolved in a small amount of water and then added to the alkaline triethanolamine solution until the initially precipitated iron(III) hydroxide redissolves, after which the solution is diluted to full volume to give ... 

Commercially available drain cleaners such as Drano and Liquid-Plumr all contain sodium hydroxide (NaOH) as an active ingredient for dissolving grease J1-5 Crystal drain cleaners contain the solid form of sodium hydroxide, while liquid drain cleaners are strong solutions of dissolved sodium hydroxide. In addition,... 

Solvated electrons were first produced in liquid ammonia when Weyl (1864) dissolved sodium and potassium in it the solution has an intense blue color. Cady (1897) found the solution conducts electricity, attributed by Kraus (1908) to an electron in a solvent atmosphere. Other workers discovered solvated electrons in such polar liquids as methylamine, alcohols, and ethers (Moissan, 1889 Scott et al, 1936). Finally, Freed and Sugarman (1943) showed that in a dilute metal—ammonia solution, the magnetic susceptibility corresponds to one unpaired spin per dissolved metal atom. 

Dissolve sodium periodate in water to a final concentration of 100 mM. Protect from light. Add 0.1 ml of this stock periodate solution to each ml of the antibody solution. 

Dissolve sodium meta-periodate in oxidation buffer at a concentration of 20 mM. Protect from light. 

Dissolve sodium periodate in water to a final concentration of 0.1 M. Protect from light. 

Dissolve sodium borohydride (NaBH4) in 5 ml of water at a concentration of 0.5mg/ml. Prepare fresh. 

Dissolve sodium periodate (NalC ) (Sigma) in 500 ml of deionized water at a concentration of 0.03 M (6.42 g). Protect from light. 

By dissolving sodium in ethylenediamine and adding this complexing agent (known as a cryptand) followed by evaporation of the solvent, it has been possible to recover a solid that contains Na+(crypt)NaA This shows that although it is rather rare, it possible for Na to complete the 3s level. Of course, this type of behavior also occurs when H is formed. 

Polyatomic species containing atoms from group IVA are produced by reducing the elements in liquid ammonia that contains some dissolved sodium. In accord with the hard-soft interaction principle (see Chapter 9), isolation of species containing large anions is best accomplished when a large cation of... 

Particles will settle out of water from a muddy stream. This water is a heterogeneous mixture, where the particles are large (in excess of 103 nm in diameter) and is a suspension. On the other hand, dissolving sodium chloride in water produces a true homogeneous solution, where the solute particles are less than 1 nm in diameter. Particles do not settle out of a true solution because of their very small particle size. However, there is a mixture with particle diameters... 

Nitrosylsulfuric acid, prepared by dissolving sodium nitrite in concentrated sulfuric acid, is employed for amines of low basicity, whose diazonium salts will hydrolyze in dilute acid. In order to synthesize Pigment Orange 5, for instance, 2,4-dinitroaniline is dissolved in concentrated sulfuric acid and diazotized preferably with nitrosylsulfuric acid. Coupling is carried out with a (3-naphthol suspension, produced by acidifying a sodium naphtholate solution. 

Materials Required Procainamide hydrochloride 0.25 g 2M hydrochloric acid 100 ml potassium bromide 3 g 0.1 M sodium nitrite Vs (dissolve sodium nitrite in sufficient water to produce 1000 ml) Standardization of 0.1 M Sodium Nitrite Vs Dissolve 0.3 g of sulphanillic acid in 50 ml of 2M hydrochloric acid, add 3 g of KBr, cool in ice and titrate with 0.1 M sodium nitrite Vs determining the end-point amperometrically. Each ml of 0.1 N sodium nitrite Vs is equivalent to 17.32 mg of C6H7N03S. 

As the enthalpy of the dissolved sodium chloride in its standard state according to Henry s law is that of the infinitely dilute solution, A// , for the reaction in Equation (20.74) is... 

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