The reaction between peroxomonosulphuric acid and cerium(IV) in dilute sulphuric acid solutions

1970 ◽  
Vol 23 (4) ◽  
pp. 641 ◽  
Author(s):  
WHO Billing ◽  
GJ Bridgart ◽  
IR Wilson
Keyword(s):  
Hydrogen Peroxide ◽  
Sulphuric Acid ◽  
Acid Solutions ◽  
Radical Chain ◽  
Rate Law ◽  
Early Stages

The reaction of cerium(1V) with peroxomonosulphuric acid in aqueous sulphuric acid has been shown to involve a short radical chain. Rates of reaction of cerium(1V) have been measured in dilute sulphuric acid solutions. A substantial difference was found between the apparent rate law in the early stages of reaction and that observed later. This is not due to the presence of hydrogen peroxide in the peroxomonosulphate solutions. A tentative mechanism is proposed.

The oxidations of DL-atrolactic and 2-hydroxyisobutyric acids by cerium(IV) in sulphuric acid solutions

1970 ◽  
Vol 23 (4) ◽  
pp. 757 ◽  
Author(s):  
VK Grover ◽  
YK Gupta
Keyword(s):  
Complex Formation ◽  
Acid Solution ◽  
Organic Acid ◽  
Sulphuric Acid ◽  
Rate Constant ◽  
Sulphuric Acid Solution ◽  
Acid Solutions ◽  
Rate Law ◽  
Hydroxyisobutyric Acid

Oxidations of DL-atrolactic and 2-hydroxyisobutyric acids by cerium(IV) in sulphuric acid solution occur in accordance with the empirical rate law: (see equation in article) where k1 is a complex rate constant and A is an unspecified constant. Spectrophotometric results suggest complex formation between cerium(1v) and the organic acid, but no kinetic evidence was obtained. Manganese(11) catalyses the reactions. DL-Atrolactic acid is more reactive than 2-hydroxyisobutyric acid. The products of oxidations were acetophenone and acetone respectively.

Mécanisme des réactions du chlorite et du dioxyde de chlore. 3. La dismutation du chlorite

1985 ◽  
Vol 63 (4) ◽  
pp. 975-980 ◽  
Author(s):  
Guy Schmitz ◽  
Henri Rooze
Keyword(s):  
Ionic Strength ◽  
Order Reaction ◽  
Second Order ◽  
Acid Solutions ◽  
Chain Mechanism ◽  
Second Order Reaction ◽  
Radical Chain ◽  
Rate Law ◽  
The Third ◽  
Reaction Proceeds

The disproportionation of chlorite was studied in 0.01 to 1 M perchloric acid solutions at 25 °C and an ionic strength of 1 M. The results suggest at least three reaction paths. The first is catalysed by Cl− ions, the second gives a second-order rate law, and the third is catalysed by iron. Its rate law is[Formula: see text]This can be interpreted by the reversible reaction [Formula: see text] followed by two rate-determining reactions Fe2+ + HClO2 → products, [Formula: see text] From this study and the former, made with added ortho-tolidine, we conclude that the second-order reaction proceeds by a radical chain mechanism.

Oxidation of ethylenediphosphinetetraacetate anions

1983 ◽  
Vol 48 (9) ◽  
pp. 2604-2608
Author(s):  
Jana Podlahová ◽  
Jaroslav Podlaha
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Electronic Structure ◽  
Acid Solutions ◽  
Tetraacetic Acid ◽  
Single Product ◽  
Weakly Acid ◽  
Inhibiting Effect ◽  
Oxidation By Molecular Oxygen ◽  
Protonated Forms

The oxidation of the ethylenediphosphinetetraacetate anion and its protonated forms by iodine, periodate, hydrogen peroxide, and oxygen has been studied in aqueous solution. The oxidation by the first three reagents is fast and yields a single product, bis(phosphine oxide), which has been isolated and characterized as ethylenebis(phosphinyl)tetraacetic acid. The oxidation by molecular oxygen proceeds considerably more slowly; in weakly acid solutions its rate is determined by the properties of the oxygen rather than by the electronic structure of the various protonated substrate species. The inhibiting effect of the phosphonium structures takes place only in strongly acid solutions.

The role of surface crystalline heterogeneities in the electrooxidation of carbon monoxide adsorbed on Rh(111) electrodes in sulphuric acid solutions

1997 ◽  
Vol 432 (1-2) ◽  
pp. 1-5 ◽  
Author(s):  
Roberto Gómez ◽  
JoséM. Orts ◽  
Juan M. Feliu ◽  
Jean Clavilier ◽  
Lorena H. Klein
Keyword(s):  
Carbon Monoxide ◽  
Sulphuric Acid ◽  
Acid Solutions
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