Thermometric Titrations in Glacial Acetic Acid.

Keily, H.J.; Hume, David N.

doi:10.1021/ac60209a065

Cited by 27 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since strengthening and weakening do not produce significant change in the entropy of solvation of an H-bonded ion pair, the free energy of transfer of the H-bonded ion pair from one solvent to another will approximately be equal to the enthalpy change of the process. Therefore, AH in low dielectric constant media where the dissociation of H-bonded ion pairs is negligible12 may be represented with the help of the Born equation as follows: AH = AG + constant = {-NZe1 23/2r){\ -1/e) + constant (7) AG = -{NZe1 /2r){\ -1 /e) Born equation Accordingly, AH of pyridine-F3CC02H in p-dioxane, carbon tetrachloride, o-xylene, and chloroform is linearly related to the inverse of permittivity (t) of the solvent (see Figure 5). The increase in the AH with the increase of dielecric constant (or decrease of 1 /e) is due to weakening of H-bonding in B+H--A-.…”

Section: IImentioning

confidence: 99%

Hydrogen-bonded species of pyridinium haloacetates. 2. Thermometric behavior in aprotic solvents

Chawla¹,

Mehta²

1984

J. Phys. Chem.

View full text Add to dashboard Cite

Section: IImentioning

confidence: 99%

Hydrogen-bonded species of pyridinium haloacetates. 2. Thermometric behavior in aprotic solvents

Chawla¹,

Mehta²

1984

J. Phys. Chem.

View full text Add to dashboard Cite

“…Smaller amounts of heats of dilution may be compensated by means of a suitable measuring technique [14,15]. One of these uses the method of thermometric difference measurement.…”

Section: Determinations Based On the Formation Of Precipitatesmentioning

confidence: 99%

Possibilities of selective thermometric determinations in multi-component systems

Sajó¹

1969

Journal of Thermal Analysis

View full text Add to dashboard Cite

The methods elaborated for the thermometric determination of the component to be analyzed in samples containing several interfering components are described. The following possibilities have so far been found for performing the determinations:The application of selective or partially selective reactions. Increasing the selectivity of the reactions by masking the interfering components. Increasing the selectivity of the reactions by utilizing the differences in behaviour of the various components towards the reagent, as for instance, differences in solubility, in stability constants, in the variation of the stability constants with pH, in the reaction rate. The use of indirect methods. Finally the correction of the interfering effect of certain components by calculation in the case of binary and multicomponent systems.The direct-reading thermometric method is a relative method, since the results are evaluated by means of a calibration graph established with model solutions

show abstract

“…In the standard addition method, AV for the titration of the dosage form was compared, in the obvious manner, to A V for a similar titration of the same amount of dosage form plus I t is easy to show that 6 The only condition which was purposely varied was the bridge sensitivity which was set a factor of 5 more sensitive for the theophylline in amiriophylline and hydrochlm-othiazide titratiuns than for the hydrochlol-ic acid titrations. Dosage Forms.-The amounts of active inpredients in the dosage forms were calculated by an absolute method and/or a standard addition method.…”

Section: C = M H ( a T C / A T H ) ( B H /~~C )mentioning

confidence: 99%