Barium acetate acid oxalate

Calcium chloride solution white, crystalline precipitate of calcium oxalate from neutral solutions, insoluble in dilute acetic acid, oxalic acid, and in ammonium oxalate solution, but soluble in dilute hydrochloric acid and in dilute nitric acid. It is the most insoluble of all oxalates (0 0067 g t 1 at 13°) and is even precipitated by calcium sulphate solution and acetic acid. Barium chloride solution similarly gives a white precipitate of barium oxalate sparingly soluble in water (0 016 g t-1 at 8°), but soluble in solutions of acetic and of oxalic acids. 

In metallic form, barium is very reactive, reacting readily with water to release hydrogen. In aqueous solution it is present as an ion with a +2 charge. Barium acetate, chloride, hydroxide, and nitrate are water-soluble, whereas barium arsenate, chromate, duoride, oxalate, and sulfate are not. Most water-insoluble barium salts dissolve in dilute acids barium sulfate, however, requkes strong sulfuric acid. 

Crucibles fitted with permanent porous plates are cleaned by shaking out as much of the solid as possible, and then dissolving out the remainder of the solid with a suitable solvent. A hot 0.1 M solution of the tetrasodium salt of the ethylenediaminetetra-acetic acid is an excellent solvent for many of the precipitates [except metallic sulphides and hexacyanoferrates(III)] encountered in analysis. These include barium sulphate, calcium oxalate, calcium phosphate, calcium oxide, lead carbonate, lead iodate, lead oxalate, and ammonium magnesium phosphate. The crucible may either be completely immersed in the hot reagent or the latter may be drawn by suction through the crucible. 

Barium acetate converts to barium carbonate when heated in air at elevated temperatures. Reaction with sulfuric acid gives harium sulfate with hydrochloric acid and nitric acid, the chloride and nitrate salts are obtained after evaporation of the solutions. It undergoes double decomposition reactions with salts of several metals. For example, it forms ferrous acetate when treated with ferrous sulfate solution and mercurous acetate when mixed with mercurous nitrate solution acidified with nitric acid. It reacts with oxahc acid forming barium oxalate. 

Barium ferrate suspended in glacial acetic acid oxidizes squalene to monoepoxysqualene in low yield.306 Potassium ferrate is unreactive towards alkanes, but when reduced by oxalic acid it... 

Oxalate Transfer 1 g of sample into a 125-mL separator, dissolve in 10 mL of water, add 2 mL of hydrochloric acid, and extract successively with one 50-mL portion and one 20-mL portion of ether. Transfer the combined ether extracts to a 150-mL beaker, add 10 mL of water, and remove the ether by evaporation on a steam bath. Add 1 drop of glacial acetic acid and 1 mLof a 1 20 calcium acetate solution to the residual aqueous solution. No turbidity develops within 5 min. Sulfate Dissolve 100 mg of sample in 2.7 N hydrochloric acid, and dilute to 30 to 40 mL with water. Proceed as directed in the Sulfate Limit Test under Chloride and Sulfate Limit Tests, Appendix IIIB, beginning with the addition of 3 mL of barium chloride TS. Any turbidity produced does not exceed that shown in a control containing 300 pig of sulfate (S04). 

Materials Solutions of calcium, strontium, and barium chlorides, ammonium carbonate, ammonium oxalate, acetic acid, and sodium chromate, calcium sulphate, strontium sulphate. 

Why does hydrochloric acid differ from acetic acid in its action with calcium oxalate (4) Why does acetic acid differ in the action with calcium oxalate and barium oxalate (5) How may a soluble calcium salt be distinguished from a barium or strontium salt ... 

Under suitable conditions it is possible to isolate the A-substituted hydroxylamines that are formed as intermediates in the reduction of nitro compounds. For this purpose it is essential in the reduction of aromatic nitro compounds to work with neutral or nearly neutral solutions suitable reducing agents are hydrogen and platinum oxide catalysts in glacial acetic acid,82,83 zinc dust in ammonium chloride solution,84 aluminum amalgam,85 and ammonium sulfide.86 Aliphatic nitro compounds may be reduced as their alkali salts (nitronates) by diborane in tetrahydrofuran, then giving A-alkylhydroxyl-amines 87 for instance, A-cyclohexylhydroxylamine is thus obtained from nitrocyclohexane in 53% yield. However, aliphatic nitro compounds are converted into A-alkylhydroxylamines more simply by catalytic hydrogenation in the presence of palladium-barium sulfate unlike aromatic nitro compounds, aliphatic nitro compounds require an acid medium for reduction to hydroxylamines an oxalic acid medium has proved the most suitable. 

Solubility of Barium Oxalate (BaCj04. H20) in Aqueous Acetic Acid at 26°-2J°. 

Ammonium oxalate solution white precipitate of barium oxalate Ba(COO)2, slightly soluble in water (0.09 g per litre = 1.7 x 10 ), but readily dissolved by hot dilute acetic acid (distinction from calcium) and by mineral acids. 

Chemically embossed metallocene polyethylene foams are used, for example in a floor covering. A blowing agent azodicarbonamide has been proposed. The blowing agent activator is selected from citric acid, oxalic acid, p-toluene sulfonic acid, phosphoric acid, potassium carbonate, borax, triethanol amine, zinc chloride, zinc acetate, zinc oxide, zinc stearate, barium stearate, calcium stearate, urea and poly(ethylene glycol) (6). 

Indicate the salts of calcium, strontium, and barium that are poorly soluble. How can you prove experimentally which of the calcium salts is the least soluble How does calcium oxalate react with acetic and hydrochloric acids How and why does the thermal... 

Succinic anhydride has been obtained by distillation of succinic acid with phosphorus pentachloride, or from benzoyl chloride and sodium succinate.1 It has been prepared from succinic acid and phosphorus oxychloride or phosphorus pentachloride 2 by distillation of succinic acid with phosphorus pent-oxide 3 from acetyl chloride and barium succinate, or from sue-cinyl chloride and sodium acetate 4 from ethyl succinate and benzoyl chloride 5 from succinic acid and acetyl chloride, or from sucdnyl chloride and oxalic acid 6 from succinic acid and suc-cinyl chloride from succinic acid and acetic anhydride 7 from succinic add and acetyl chloride 8 and from sodium succinate and acetic anhydride.9... 

Other physical phenomena that may be associated, at least partially, with complex formation are the effect of a salt on the viscosity of aqueous solutions of a sugar and the effect of carbohydrates on the electrical conductivity of aqueous solutions of electrolytes. Measurements have been made of the increase in viscosity of aqueous sucrose solutions caused by the presence of potassium acetate, potassium chloride, potassium oxalate, and the potassium and calcium salt of 5-oxo-2-pyrrolidinecarboxylic acid.81 Potassium acetate has a greater effect than potassium chloride, and calcium ion is more effective than potassium ion. Conductivities of 0.01-0.05 N aqueous solutions of potassium chloride, sodium chloride, potassium sulfate, sodium sulfate, sodium carbonate, potassium bicarbonate, potassium hydroxide, and sodium hydroxide, ammonium hydroxide, and calcium sulfate, in both the presence and absence of sucrose, have been determined by Selix.88 At a sucrose concentration of 15° Brix (15.9 g. of sucrose/100 ml. of solution), an increase of 1° Brix in sucrose causes a 4% decrease in conductivity. Landt and Bodea88 studied dilute aqueous solutions of potassium chloride, sodium chloride, barium chloride, and tetra-... 

Acid cleaning agents such as hydrochloric, phosphoric, or citric acids effectively remove common scaling compounds. With cellulose acetate membranes the pH of the solution should not go below 2.0 or else hydrolysis of the membrane will occur. Oxalic acid is particularly effective for removing iron deposits. Acids such as citric acid are not very effective with calcium, magnesium, or barium sulfate scale in this case a chelatant such as ethylene diamine tetraacetic acid (EDTA) may be used. 

The interesting ring transformations that this compound undergoes have already been discussed (Sections V,C,1 and 2). Its degradation reactions are rather involved and have not been completely satisfactorily worked out. Sodium hydroxide is reported simply to produce benzoate ion, while with hydrochloric acid it affords oxalic acid, hydroxylamine, and benzoic acid.478 It is less extensively broken down by barium hydroxide, with which it forms the barium salt of benzoylmethazonic acid (227).479 Acetic anhydride is reported to form the diacetyl derivative (228)480 Boyer seems to have had some reservations over the latter structure481 the former, too, seems rather unexpected. 

Ammonium nitrate Ammonium nitrite Ammonium oxalate Ammonium salicylate Ammonium sulfate Ammonium sulfide Ammonium sulfite Ammonium thiosulfate Amyl acetate Amyl alcohol Amyl chloride Amyl mercaptan Amyl naphthalene Amyl nitrate Amyl nitrite Amyl phenol Aniline hydrdochloride Aniline sulfate Aniline sulfite Animal fats Animal oils Anthraquinone Antimony sulfate Antimony tribromide Antimony trichloride Antimony trioxide Aqua regia Arsenic oxide Arsenic trichloride Arsenic trioxide Arsenic trisulfide Ascorbic acid Barium carbonate Barium chlorate Barium chloride, aqueous Barium cyanide Barium hydroxide Barium iodide Barium nitrate Barium oxide Barium peroxide Barium salts Beet sugar liquors Benzaldehyde Benzene... 

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