The reaction between iodide and iodate ions – a long lasting kinetic problem

The oxidation of nitrite ions and of iodate ions by hypochlorite ions in aqueous solution has been examined. The oxidation of nitrite is really a reaction of hypochlorous acid, with the slow stage HOCl + NO2− + H2O → H3O+ + Cl− + NO3−. The rate constant is given by log k = 7.36−6450/RT (time in minutes, and the activation energy in calories). The oxidation of iodate is chiefly a reaction of hypochlorite ions, probably ClO− + IO3− → Cl− + IO4−, although the rate is somewhat increased by a higher concentration of hydroxide ions. The rate constant is given by log k = 16.15−26,100/RT. These results are compared with other oxidations by hypochlorite ions, to see if any general trends are apparent.

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Features of Difference Scheme for the Diffusion-Kinetic Problem of Ion Implantation with Intermetallic Phases Formation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.685.195 ◽

2016 ◽

Vol 685 ◽

pp. 195-199

Author(s):

Khan Asfandyar ◽

Anna G. Knyazeva

Keyword(s):

Ion Implantation ◽

Difference Scheme ◽

Intermetallic Phase ◽

Relaxation Times ◽

Phase Evolution ◽

Linear Difference Equations ◽

Sweep Method ◽

Diffusion Kinetic ◽

Kinetic Problem ◽

Mass Fluxes

The implicit difference scheme has been suggested for the solution of diffusion-kinetic problem describing the ion implantation by intermetallic phase formation. The model corresponds to irreversible conditions and includes finite relaxation times for mass fluxes. The linear difference equations are solved by double-sweep method. The result illustrates the convergence of difference scheme at variation of its parameters. Qualitative picture of phase evolution in the surface layer is obtained different for problem with finite relaxation times and for zero relaxation times.

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1. On Some Capillary Phenomena

Proceedings of the Royal Society of Edinburgh ◽

10.1017/s0370164600041456 ◽

1866 ◽

Vol 5 ◽

pp. 593-594

Author(s):

Tait

Keyword(s):

Rapid Change ◽

Closed Shell ◽

Soap Bubble ◽

Coal Gas ◽

Kinetic Problem ◽

Capillary Phenomena ◽

Two Bubbles

This communication was intended to illustrate by experiments with the solution of glycerine and oleate of soda, devised by Plateau, the mode in which a soap-bubble is detached as a closed shell from the mouth of a funnel; the mode in which two bubbles unite; and the process of cutting one into two or more.A statical investigation of the form of an unclosed film, blown with coal gas, was given (the kinetic problem presenting very grave difficulties), and the results were shown to be in accordance with observation, so far as the eye can follow the rapid change which takes place in the neck of the film just before the closed bubble is detached.

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Photochemical deposition of palladium nanoflowers on TiO2 nanotubes and their application for the electrocatalytic measurement of iodate ions

Microchemical Journal ◽

10.1016/j.microc.2020.105425 ◽

2020 ◽

Vol 159 ◽

pp. 105425

Author(s):

Fereshteh Koohi ◽

Hamid R. Zare ◽

Zahra Shekari

Keyword(s):

Tio2 Nanotubes ◽

Photochemical Deposition ◽

Iodate Ions

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Simple New Method for the Preparation of La(IO3)3 Nanoparticles

Nanomaterials ◽

10.3390/nano10122400 ◽

2020 ◽

Vol 10 (12) ◽

pp. 2400 ◽

Cited By ~ 1

Author(s):

Zoulikha Hebboul ◽

Amira Ghozlane ◽

Robin Turnbull ◽

Ali Benghia ◽

Sara Allaoui ◽

...

Keyword(s):

Single Phase ◽

New Method ◽

X Ray Diffraction ◽

Chemical Route ◽

X Ray ◽

The Common ◽

Controlled Preparation ◽

Iodate Ions ◽

Scanning Electron ◽

Soft Chemical Route

We present a cost- and time-efficient method for the controlled preparation of single phase La(IO3)3 nanoparticles via a simple soft-chemical route, which takes a matter of hours, thereby providing an alternative to the common hydrothermal method, which takes days. Nanoparticles of pure α-La(IO3)3 and pure δ-La(IO3)3 were synthesised via the new method depending on the source of iodate ions, thereby demonstrating the versatility of the synthesis route. The crystal structure, nanoparticle size-dispersal, and chemical composition were characterised via angle- and energy-dispersive powder X-ray diffraction, scanning electron microscopy, and Fourier-transform infrared spectroscopy.

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