Potassium perchlorate, solution

Procedure To the sample which contains 20-300 /xg of pertechnetate in 5-20 ml of solution, are added potassium perchlorate solution (2 ml, 1 mg KCIO per ml) and enough NaCl to make the solution approximately 1 M. The solution is heated and neutralized with ammonia. Pertechnetate is precipitated with aqueous 5 % tetraphenylarsonium chloride reagent. The precipitate is filtered, washed and dried, and a 2-mg portion is mixed with potassium bromide (300 mg). The mixture is pressed to form a clear disc by the usual technique. The infrared spectrum is recorded between 10 and 12 /x. The peak absorption is measured at 11.09 /X by the base-line technique. 

This paper reports cryoscopic measurements for NiS04 aqueous solutions in saturated potassium perchlorate solutions (eutectic freezing point 272.99 K, freezing point depressions, AT, are between 0.0673 K and 0.181 K). Thus, the measurements were done with less variation of ionic strength than for measurements done in water. The results of this study are assessed in our discussion of a later paper [58KEN] by the same author. 

Examples of Values of L and AF°. As a first example we may evaluate both L and AF° for a moderately soluble salt in aqueous solution. At 25° a saturated solution of potassium perchlorate has a concentration of 0.148 mole of KCIO4 in a 1000 grams of water that is to say, y+ = y = 0.148/55.5. The activity coefficient in the saturated solution has been taken1 to be 0.70 + 0.05. Using this value, we can estimate the work required to take a pair of ions from the crystal surface to mutually distant points, when the crystal is in contact with pure solvent at 25°C ... 

Perchlorate as potassium perchlorate (ca 400 mg as the sodium salt in 25 mL solution). Warm the solution to 80-90 °C and treat with a slight excess of a cold saturated solution of potassium acetate. Allow to cool and after 1 hour collect the precipitate on a weighed porcelain filtering crucible. Wash twice with 0.05M potassium chloride and then with four 5 mL portions of equal volumes of anhydrous ethyl acetate and anhydrous butan-l-ol. Dry the precipitate at 110°C for 30-60 minutes and then heat at 350 °C in an electric furnace for 15 minutes. Weigh as KC104 (Section 11.68). 

Reference electrodes are usually a calomel or a silver-silver chloride electrode. It is advisable that these be of the double-junction pattern so that potassium chloride solution from the electrode does not contaminate the test solution. Thus, for example, in titrations involving glacial acetic acid as solvent, the outer vessel of the double junction calomel electrode may be filled with glacial acetic acid containing a little lithium perchlorate to improve the conductance. 

Standardisation may be carried out by the use of solutions prepared from a chromium-free standard steel and standard potassium dichromate solution. After dissolution of the standard steel, the solution is boiled with perchloric... 

Mixtures of aluminium powder with liquid chlorine, dinitrogen tetraoxide or tetran-itromethane are detonable explosives, but not as powerful as aluminium-liquid oxygen mixtures, some of which exceed TNT in effect by a factor of 3 to 4 [1], Mixtures of the powdered metal and various bromates may explode on impact, heating or friction. Iodates and chlorates act similarly [2], Detonation properties of gelled slurries of aluminium powder in aqueous nitrate or perchlorate salt solutions have been studied [3], Reactions of aluminium powder with potassium chlorate or potassium perchlorate have been studied by thermal analysis [4],... 

What ions would you find in solution if potassium perchlorate was dissolved in water ... 

Aqueous perchlorate solutions, 18 274 Aqueous plugs, in microfluidics, 26 968 Aqueous polytetrafluoroethylene dispersions, 18 291 Aqueous potassium permanganate solutions, 15 597-600 Aqueous ring-opening metathesis polymerization (ROMP), 15 495... 

Nitrites, inorganic Nitrogen oxides (NOx) Oxygen Peracetic acid Perchloric acid solutions Potassium bromate Potassium chlorate Potassium dichloro-s-triazinetrione (potassium dichloroisocyanurate) Potassium dichromate Potassium percarbonate Potassium perchlorate Potassium permanganate Potassium peroxide Potassium persulfate Potassium superoxide n-Propyl nitrate... 

Potassium perchlorate is produced commercially by electrolysis of a saturated solution of potassium chlorate. Hydrogen gas is liberated at the cathode. The reaction at the anode is ... 

In aqueous solution the reactions of potassium perchlorate are those of the CIO4 ion. 

Elemental composition K 28.22%, Cl 25.59%, and 0 46.19%. An aqueous solution is analyzed for potassium by AA, ICP, and other methods (see Potassium). Perchlorate ion may be analyzed by ion chromatography or a liquid-membrane electrode. Iodide, bromide, chlorate, and cyanide ions interfere in the electrode measurement. Alternatively, perchlorate ion may be measured by redox titration. Its solution in 0.5M H2SO4 is treated with a measured excess standard ferrous ammonium sulfate. The excess iron(II) solution is immediately titrated with a standard solution of potassium dichromate. Diphenylamine sulfuric acid may be used as an indicator to detect the end point ... 

Potassium Dichromate Solutions. Preparation of the potassium chromate solution differs for the NIST and BP/EP procedures. For the NIST procedure, a solution of potassium dichromate (0.06 g of dichromate per kilogram of solvent) is prepared in 0.001 N perchloric acid. A 0.001 N perchloric acid solution as the reference is scanned and then the potassium dichromate solutions at 235, 257, 313, and... 

Blood Blood is taken from the vein without stasis. Additions of oxalate, fluoride, heparin, or ethylenediaminetetraacetic acid (EDTA) are without effect. Add 3 ml blood to 6 ml ice-cold perchloric acid, mix thoroughly and centrifuge for 15 min at 1000 xg. To 3 ml of the supernatant add 1 ml of potassium carbonate solution. After 15 min in an ice-bath, filter off the precipitate. Use the resultant solution for assay at room temperature. The content of fructose in blood is stable for 24 h when stored at 4°C. 

Nitrates. — On heating a mixture of 1 gm. of potassium perchlorate with 5 cc. of sodium hydroxide solution (sp. gr. 1.3) and a mixture of 0.5 gm. of zinc dust and 0.5 gm. of powdered iron, no vapors of ammonia should be evolved (to be ascertained by moist litmus paper). 

Oxidation of 2-(3-aminopropyl-l,2,3,4-tetrahydroisoquinoline with mercuric acetate in 4% aqueous acetic acid at 50°C for 6 h, and then at room temperature overnight followed by the treatment of the filtered solution with 20% potassium hydroxide solution, yielded 1,3,4,6,7,llb-hexahydro-2//-pyrimido[2,l-a]isoquinoline (16, R = R1 = H) in 27% yield (73JOC437). 1,3,4,6,7,llb-Hexahydro-2//-primido[2,l-a]isoquinolines (16, R = H, MeO, R1 = H) and their 2-oxo derivatives (18, R = H, MeO, R1 = H) were obtained from 2-(3-aminopropyl)- and 2-(2-aminocarbonylethyl)-3,4-dihydroisoquinolinium salts (17 and 19, R = H, MeO, R1 = H) by treatment with a base (62CB2122,62MI1). The adjustment of the pH value of a solution of l-methyl-2-(2-aminocarbonylethyl)-3,4-dihydroisoquinolinium perchlorate (19, R = H, R1 = Me, X = C104) in 10% aqueous acetic acid with sodium carbonate to 9 yielded 1 lb-methyl-1,3,4,6,7,1 lb-hexahydro-2//-primido[2,l-a]isoquinolin-2-one (111) (93KGS499). 

Chlorate. Potassium chlorate, [CAS 3811-04-9], chlorate of potash, KCIO, white solid, soluble, mp about 350°C, powerful oxidizing agent, and consequently a fire hazard with dry organic materials, such as clothes, and with sulfur upon heating oxygen is liberated and the residue is potassium chloride formed by electrolysis of potassium chloride solution under proper conditions, Used (l)m matches, (2) in pyrotechnics, (3) as disinfectant, (4) as a source of oxygen upon heating, (Hazardous Use of potassium perchlorate is recommended instead )... 

Perchlorate. Potassium perchlorate. [CAS 7778-74-7]. KCKU. white solid, very slightly soluble, mp 610°C, but above 400VC decomposes with evolution of oxygen gas and formation of potassium chloride residue formed (1) by electrolysis of potassium chlorate under proper conditions. (2) by heating potassium chlorate at 48(UC and then fractional crystallization. Used (1) as a convenient and safe (preferred to use of potassium chlorate) method of preparing oxygen by heating, (2) 111 the determination of potassium in soluble salt solution. 

For most potentiometric measurements, either the saturated calomel reference electrode or the silver/silver chloride reference electrode are used. These electrodes can be made compact, are easily produced, and provide reference potentials that do not vary more than a few mV. The silver/silver chloride electrode also finds application in non-aqueous solutions, although some solvents cause the silver chloride film to become soluble. Some experiments have utilised reference electrodes in non-aqueous solvents that are based on zinc or silver couples. From our own experience, aqueous reference electrodes are as convenient for non-aqueous systems as are any of the prototypes that have been developed to date. When there is a need to exclude water rigorously, double-salt bridges (aqueous/non-aqueous) are a convenient solution. This is true even though they involve a liquid junction between the aqueous electrolyte system and the non-aqueous solvent system of the sample solution. The use of conventional reference electrodes does cause some difficulties if the electrolyte of the reference electrode is insoluble in the sample solution. Hence, the use of a calomel electrode saturated with potassium chloride in conjunction with a sample solution that contains perchlorate ion can cause dramatic measurements due to the precipitation of potassium perchlorate at the junction. Such difficulties normally can be eliminated by using a double junction that inserts another inert electrolyte solution between the reference electrode and the sample solution (e.g., a sodium chloride solution). 

In order to minimize thyroid uptake of free radioactive iodine derived from radiolabelled allergen deiodination, saturated potassium iodide solution was given to the subjects in the 5 days before the study followed by potassium perchlorate for 2 days, starting from the day of the study. 

In addition to the method outlined under procedure A, hydrazoic acid may be prepared by the action of oxalic1 or fluosilicic acids2 upon solutions of sodium azide or by the treatment of barium azide solutions with dilute sulfuric acid. A method involving the action of perchloric acid upon potassium azide has also been proposed. However, subsequent distillation of the filtrate, after removal of the precipitated potassium perchlorate, is necessary to prepare pure hydrazoic acid. Pure hydrazoic acid has also been obtained by the oxidation of hydrazine in acid solution by hydrogen peroxide.3-"... 

The chlorates, like the nitrates, are all readily soluble in water lead and silver chlorites, like the corresponding nitrites, are sparingly soluble salts and lead perchlorate is the only salt which does not easily dissolve. As already mentioned, chloric acid is readily decomposed when its aqueous solution is warmed chlorous acid is still less stable but perchloric acid, which may be prepared by distilling together potassium perchlorate with concentrated sulphuric acid, is relatively stable, seeing that it can be distilled without decomposition. It is an oily liquid, with acid taste it is apt to explode when brought into contact... 

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