Molar Volumes of Ethoxylated Nonylphenols in Micellar Solutions

Excess molar volumes in the benzene-tert-amyl methyl ether and cyclohexane-tert-amyl methyl ether systems were measured by a vibrating-tube densimeter at 298.15 K and compared with the data for the methanol-tert-amyl methyl ether system determined previously. Besides, the refractive indices in both the systems were measured at the same temperature.

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Effect of cetyltrimethylammonium bromide on the electrochemiluminiscence and electrooxidation of luminol

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19830477 ◽

1983 ◽

Vol 48 (2) ◽

pp. 477-483 ◽

Cited By ~ 3

Author(s):

Jan Lasovský ◽

František Grambal

Keyword(s):

Cetyltrimethylammonium Bromide ◽

Linear Sweep Voltammetry ◽

Critical Micellar Concentration ◽

Peak Height ◽

Anodic Peak ◽

Alkaline Solutions ◽

Platinum Electrodes ◽

Micellar Solutions ◽

Linear Sweep ◽

Low Concentrations

The electrooxidation of luminol in alkaline solutions in the presence of cetyltrimethylammonium bromide (I) was studied by linear sweep voltammetry on fixed and vibrating platinum electrodes. The presence of I in low concentrations (below the critical micellar concentration) brings about aggregation of the luminol, which is manifested by an increase in the anodic peak height and its shift towards lower potentials. In micellar solutions the peak height decreases owing to the slower diffusion of the bulkier micelles, the shift to lower potentials being preserved. The light-voltage curves correspond with the voltammetric curves, exhibiting identical shifts of the peak potentials in dependence on the concentration of the surfactant.

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Partial Molar Volumes of Some Multicharged Electrolytes in Aqueous Dimethylformamide at Various Temperatures

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19980507 ◽

1998 ◽

Vol 63 (4) ◽

pp. 507-514

Author(s):

Madan L. Parmar ◽

Ch. V. Nageshwara Rao ◽

Suresh Chand Attri

Keyword(s):

Partial Molar Volumes ◽

Water Systems ◽

Molar Volumes ◽

Density Measurements ◽

Solution Density ◽

Aluminium Sulfate ◽

Ion Interactions

Partial molar volumes of ammonium aluminium sulfate and potassium aluminium sulfate in DMF-water mixtures (5-20 wt.% of DMF) have been determined from solution density measurements at various temperatures and electrolyte concentrations. The data were evaluated by using Masson equation and the obtained parameters were interpreted in terms of ion-solvent and ion-ion interactions. Both electrolytes have been found to act as the structure makers/promotors in DMF-water systems.

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Excess molar volumes of binary mixtures of acetic acid and propionic acid with some members of homologous series of alkanes

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19910736 ◽

1991 ◽

Vol 56 (4) ◽

pp. 736-744 ◽

Cited By ~ 11

Author(s):

Ondřej Drábek ◽

Ivan Cibulka

Keyword(s):

Acetic Acid ◽

Propionic Acid ◽

Alkyl Chain ◽

Excess Molar Volumes ◽

Liquid Mixtures ◽

Entire Concentration Range ◽

Molar Volumes ◽

Binary Liquid ◽

Alkane Molecule ◽

Increasing Temperature

Excess molar volumes of binary liquid mixtures of (acetic or propionic acid = hexane) at 25 and 35°C, and (acetic or propionic acid + heptane or octane) and (acetic acid + dodecane) at 25°C, measured with a tilting dilution dilatometer, are reported. The excess volumes are positive over the entire concentration range for all mixtures and increase with increasing length of an alkane molecule, decrease with increasing of the alkyl chain in a molecule of carboxylic acid, and increase with increasing temperature.

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Correlation of Density of Aqueous Solutions of NaOH, KOH, Na2CO3, and K2CO3

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19932059 ◽

1993 ◽

Vol 58 (9) ◽

pp. 2059-2068

Author(s):

Zdeněk Palatý

Keyword(s):

Aqueous Solutions ◽

Electrolyte Solution ◽

Molar Volumes

The paper deals with correlation of density of aqueous solutions of NaOH, KOH, Na2CO3, and K2CO3 using an equation based on the additivity of molar volumes of components, the components being water and so-called basic electrolyte solution with precisely defined and measurable properties. The procedure mentioned has been tested at 20 °C using literature data. The procedure has been shown to give very precise results.

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