IONIC SPECIES IN CERIC PERCHLORATE SOLUTIONS

1951 ◽  
Vol 29 (10) ◽  
pp. 818-827 ◽  
Author(s):  
T. J. Hardwick ◽  
E. Robertson
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Spectral Study ◽  
Wave Length ◽  
Ionic Species ◽  
Thermodynamic Quantities ◽  
Perchloric Acid Solution ◽  
Extinction Coefficients ◽  
Ceric Ion ◽  
Molar Extinction Coefficients

Ceric ion has been shown to exist in perchloric acid solution as a mixture of Ce4+, CeOH3+, and a dimer, probably (Ce-O-Ce)6+. From a spectral study between 395 and 430 mμ, the values of the equilibrium ratios have been determined, along with the molar extinction coefficients of each ion over this region of wave length. The thermodynamic quantities ΔH, ΔF°, and ΔS° have been determined for each reaction.

ASSOCIATION OF CERIC IONS WITH SULPHATE (A SPECTRAL STUDY)

1951 ◽  
Vol 29 (10) ◽  
pp. 828-837 ◽  
Author(s):  
T. J. Hardwick ◽  
E. Robertson
Keyword(s):  
Spectral Study ◽  
Association Constants ◽  
Extinction Coefficients ◽  
Ceric Ion ◽  
Molar Extinction Coefficients

Ceric ion has been shown to associate with sulphate ion to form successively Ce(SO4++, Ce(SO4)2, and Ce(SO4)3−. The association constants relating these species have been determined at 25 °C. The molar extinction coefficients of each associated complex have been found between 395 and 430 mμ. Migration experiments bear out the results qualitatively.

Extended Preservation of Iron for Transmission

1967 ◽  
Vol 25 ◽  
pp. 354-355
Author(s):  
E. P. Abrahamson II ◽  
M. W. Dumais
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Microscopy Study ◽  
Perchloric Acid Solution ◽  
Transmission Microscopy ◽  
Iron Base ◽  
Cold Stage

In a transmission microscopy study of iron and dilute iron base alloys, it was determined that it is possible to preserve specimens for extended periods of time. Our specimens were prepunched from 5 to 8 mil sheet to microscope size and annealed for several hours at 700°C. They were then thinned in a glacial acetic-12 percent perchloric acid solution using 10 volts and 20 milliamperes, at a temperature of 8 to 14°C.It was noted that by the use of a cold stage, the same specimen can be observed for periods up to one week without excess contamination. When removal of the specimen from the column becomes necessary, it was observed that a specimen may be kept for later observation in 1,2 dichloroethene or methanol for periods in excess of two weeks.

Dinuclear complexes of tetravalent cerium in an aqueous perchloric acid solution

2012 ◽  
Vol 41 (24) ◽  
pp. 7190 ◽  
Author(s):  
Atsushi Ikeda-Ohno ◽  
Satoru Tsushima ◽  
Christoph Hennig ◽  
Tsuyoshi Yaita ◽  
Gert Bernhard
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Dinuclear Complexes ◽  
Perchloric Acid Solution ◽  
Aqueous Perchloric Acid ◽  
Tetravalent Cerium

ISOTOPIC EXCHANGE REACTIONS IN THE SYSTEM BROMINE – BROMATE – HYPOBROMOUS ACID

1951 ◽  
Vol 29 (8) ◽  
pp. 655-665 ◽  
Author(s):  
R. H. Betts ◽  
Agnes N. Mackenzie
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Isotopic Exchange ◽  
Exchange Reactions ◽  
Perchloric Acid Solution ◽  
Hypobromous Acid ◽  
Measurable Rate ◽  
Time Required ◽  
Secondary Chemical ◽  
Kinetics Of

Radiotracer studies with Br82 show that bromine and bromate ion in perchloric acid solution undergo isotopic exchange at a measurable rate. The kinetics of the process suggest that secondary chemical reactions occur, leading to the formation of significant concentrations of hypobromous acid in the system. The isotopic exchange between hypobromous acid and bromine is complete within the time required to separate these species.

Underpotential Deposition of Te Monolayers on Au Surfaces from Perchloric Acid Solution Studied by Chronocoulometry and EQCM

2002 ◽  
Vol 106 (47) ◽  
pp. 12247-12252 ◽  
Author(s):  
Igor Nicic ◽  
Jie Liang ◽  
Vince Cammarata ◽  
Murat Alanyalioglu ◽  
Umit Demir ◽  
...  
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Underpotential Deposition ◽  
Perchloric Acid Solution

Solvent extraction of pertechnetate with TBP from perchloric acid solution

1994 ◽  
Vol 181 (1) ◽  
pp. 71-76 ◽  
Author(s):  
T. Omori ◽  
M. Tadokodo ◽  
Y. Suzuki ◽  
H. Suganuma ◽  
K. Yoshihara
Keyword(s):  
Solvent Extraction ◽  
Acid Solution ◽  
Perchloric Acid ◽  
Perchloric Acid Solution
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