CHELATION STUDY OF COPPER (II): FULVIC ACID SYSTEM

1973 ◽  
Vol 53 (4) ◽  
pp. 377-382 ◽  
Author(s):  
VENGHUOT CHEAM
Keyword(s):  
Fulvic Acid ◽  
Mole Fraction ◽  
Sodium Nitrate ◽  
Direct Approach ◽  
Acid System ◽  
Selective Electrode ◽  
Cupric Ion ◽  
Equilibrium Quotient ◽  
Chelation Reaction ◽  
Nitrate Solutions

The chelation reaction between Cu (II) and fulvic acid has been investigated using a relatively new direct approach — that of titration with a cupric ion-selective electrode. The results of different investigators are in fair agreement with each other if they are interpreted in terms of both pH and mole fraction of reactants. In 0.1 M sodium nitrate solutions with a copper mole fraction equal to 0.5 ± 0.2, the equilibrium quotient at 25 C and pH 3 was found to be 2.2 ± 0.1.

Thermoelectric Studies of Silver Nitrate in Sodium Nitrate – Potassium Nitrate Eutectic Melt

1971 ◽  
Vol 49 (12) ◽  
pp. 2044-2047
Author(s):  
L. G. Boxall ◽  
K. E. Johnson
Keyword(s):  
Seebeck Coefficient ◽  
Silver Nitrate ◽  
Mole Fraction ◽  
Sodium Nitrate ◽  
Nitrate Concentration ◽  
Potassium Nitrate ◽  
Silver Nitrate Concentration ◽  
Eutectic Melt

The Seebeck coefficient, εT, of the thermocell Ag(T)/AgNO3 in NaNO3 − KNO3/Ag (T + ΔT) was measured as a function of silver nitrate concentration and temperature. Extrapolation of the results to unit mole fraction, N, of AgNO3 gave the value εT0 = − 277.5 − 0.136T °C (µV deg−1).For several mixed melts of AgNO3 and an alkali nitrate the function [Formula: see text] was calculated and shown to be linear in N. P was extrapolated to finite values for the pure alkali nitrates.

Extraction Behavior of Ln(III) Ions by T2EHDGA/n-Dodecane from Nitric Acid and Sodium Nitrate Solutions

2018 ◽  
Vol 36 (4) ◽  
pp. 331-346 ◽  
Author(s):  
Emily Campbell ◽  
Vanessa E. Holfeltz ◽  
Gabriel B. Hall ◽  
Kenneth L. Nash ◽  
Gregg J. Lumetta ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Sodium Nitrate ◽  
Extraction Behavior ◽  
Nitrate Solutions

Study of magnesium nitrate behavior in sodium nitrate solutions at 25°C

2011 ◽  
Vol 84 (7) ◽  
pp. 1148-1151 ◽  
Author(s):  
O. M. Polishchuk ◽  
A. A. Fakeev ◽  
N. V. Potapova ◽  
A. G. Vendilo
Keyword(s):  
Sodium Nitrate ◽  
Magnesium Nitrate ◽  
Nitrate Solutions

Thermodynamics of transfer of glycine, diglycine, and triglycine from water to aqueous solutions of urea, glycerol, and sodium nitrate

1988 ◽  
Vol 66 (3) ◽  
pp. 461-468 ◽  
Author(s):  
Himansu Talukdar ◽  
Sibaprasad Rudra ◽  
Kiron K. Kundu
Keyword(s):  
Sodium Nitrate ◽  
Regular Function ◽  
Scaled Particle Theory ◽  
Aqueous Mixtures ◽  
Free Energies ◽  
Thermodynamics Of Transfer ◽  
Different Temperatures ◽  
Composition Profiles ◽  
Cavity Effect ◽  
Nitrate Solutions

Standard free energies [Formula: see text] and entropies [Formula: see text] of transfer of glycine (G), diglycine (DG), and triglycine (TG), from water to aqueous mixtures of glycerol (GL) and urea (UH) have been determined from solubility measurements at different temperatures. This was also extended to an ionic cosolvent system like aqueous sodium nitrate solutions for G and DG. The observed [Formula: see text] and [Formula: see text]–composition profiles, as well as those obtained after correcting for the "cavity effect" as estimated by scaled particle theory (SPT), were examined in the light of various interactions. The corrected [Formula: see text]and [Formula: see text] values show a regular function of the peptide chain length of the amino acids and impart useful information regarding the involved relative structural effects of these ionic and non-ionic cosolvents.

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