Tetraphenylarsonium Chloride as an Analytical Reagent: Titration by Iodine

Willard, H. H.; Smith, G. McP.

doi:10.1021/ac50132a003

Cited by 70 publications

(11 citation statements)

References 1 publication

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“…The transformation of I to IV, which contains a hypochlorous acid molecule and a distorted perchoric acid molecule, is most likely favored thermodynamically judging from electrochemical data that are available for the analogous transformation (eq 24) involving unassociated HC102 + C1CV -HCIO + C104-E0 = 0.473 V (24) species (Bard et al, 1985). The electrode potential value for reaction 24 indicates that the reaction is favored thermodynamically with an equilibrium constant, K = 7 X 1014; however, we did not find perchlorate as a product of the chlorous acid-chlorate reaction when we titrated the reaction solutions with tetraphenylarsonium chloride (Willard and Smith, 1939). Taube and Dodgen (1949) were also unable to detect perchlorate in similar experiments.…”

Section: Resultsmentioning

confidence: 92%

Kinetics and mechanism of the reaction of chlorous acid with chlorate in aqueous sulfuric acid

Hoq¹,

Indu²,

Ernst³

1992

Ind. Eng. Chem. Res.

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Section: Resultsmentioning

confidence: 92%

Kinetics and mechanism of the reaction of chlorous acid with chlorate in aqueous sulfuric acid

Hoq¹,

Indu²,

Ernst³

1992

Ind. Eng. Chem. Res.

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“…I n the course of conducting cyclic voltammetric experiments in aerated DMSO (12) we observed a quasireversible reoxidation for the first oxygen reduction product. It is very unlikely that any reduction involving the consumption of protons would occur reversibly in a solvent with such low proton availability; therefore, it was concluded that the usual 2-electron reduction to HOz-was not operative.…”

Section: Reduction Of Oxygen To Superoxide In Aprotic Solventsmentioning

confidence: 78%

Vanadium(III) Sulfate as a Reducing Agent for Determination of Perchlorate.

Zatko¹,

Kratochvil²

1965

Anal. Chem.

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b Air-stable, solid V2(SO& quantitatively reduces perchlorate to chloride upon 5 to 10 minutes' refluxing in 7 to 8M HzS04 in the presence of Os04 as catalyst. The determination is completed by potentiometric titration of the chloride formed or by spectrophotometric measurement of the VO+2 formed. Accuracies of 0.1 to 0.2% are obtained for 0.01-to 3-mmole samples by chloride determination. The spectrophotometric method gives accuracies of 1 to 270, with some interference by V(III) absorption. A correlation between the effectiveness of a metal ion as a reductant for perchlorate and the affinity of the oxidized metal for oxygen is noted. RESENT analytical methods for

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“…Conductance titrations were initially performed in acidic solutions, in keeping with the potentiometric back-titration method of Willard and Smith (13) and the gravimetric method of Glover and Rosen (14). However, the titration curves, prior to the equivalence point, were found to be nonlinear, making it difficult to determine the end point readily.…”

Section: Resultsmentioning

confidence: 99%

Conductometric titration of perchlorate with tetraphenylarsonium chloride

Baczuk¹,

Bolleter²

1967

Anal. Chem.

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Many volumetric methods have been reported for the determination of perchlorate. Most of these are indirect, requiring reduction to chloride. Either the chloride is subsequently measured (7-J) or the amount of reductant is determined by back-titration (4, 6, 7). These methods are all subject to interference by other halide salts or reducible substances.Several direct methods have also been reported. A microgravimetric technique using 3,5,6,8-tetramethyl-l,10-phenanthroline to precipitate perchlorate was reported by Brandt and Smith (8). Perchlorate has been determined colorimetrically by Bodenheimer and Weiles (9) in pyridine as the cupric tetrapyridine salt and by Fritz, Abbink, and Campbell (70) as ferrous 1,10-phenanthroline perchlorate in «-butyronitrile. Tetraphenylphosphonium chloride has been used by Nezu (77) as an amperometric titrant for perchlorate. Recently, Morris (72) described the amperometric determination of perchlorate by titration with tetraphenylstibonium sulfate.The use of tetraphenylarsonium ion for perchlorate analysis was reported as early as 1939 by Willard and Smith (13), who proposed a potentiometric back-titration with triiodide. Recently, the reagent was used for the gravimetric determination of ammonium perchlorate by Glover and Rosen (14). Another approach to the use of this reagent for perchlorate determination, herein proposed, incorporates the use of conductance for the titration of perchlorate with tetraphenylarsonium chloride. EXPERIMENTAL Reagents. Tetraphenylarsonium chloride (J. T. Baker Chemical Co.) and tetraphenylarsonium chloride hydrochloride (Eastman Organic Chemical Co. and Hach Chemical

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Tetraphenylarsonium Chloride as an Analytical Reagent: Titration by Iodine

Cited by 70 publications

References 1 publication

Kinetics and mechanism of the reaction of chlorous acid with chlorate in aqueous sulfuric acid

Kinetics and mechanism of the reaction of chlorous acid with chlorate in aqueous sulfuric acid

Vanadium(III) Sulfate as a Reducing Agent for Determination of Perchlorate.

Conductometric titration of perchlorate with tetraphenylarsonium chloride

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