THE LIMITING EQUIVALENT CONDUCTANCES OF SEVERAL UNIVALENT IONS IN WATER AT 25°

1932 ◽  
Vol 54 (7) ◽  
pp. 2758-2762 ◽  
Author(s):  
Duncan A. MacInnes ◽  
Theodore Shedlovsky ◽  
Lewis G. Longsworth
Keyword(s):  
Limiting Equivalent Conductances

CONDUCTANCES OF AQUEOUS SOLUTIONS OF SODIUM OCTANOATE AT 25° AND 35° AND THE LIMITING CONDUCTANCE OF THE OCTANOATE ION

1962 ◽  
Vol 40 (5) ◽  
pp. 839-844 ◽  
Author(s):  
A. N. Campbell ◽  
E. M. Kartzmark ◽  
G. R. Lakshminarayanan
Keyword(s):  
Aqueous Solutions ◽  
Micelle Formation ◽  
Sodium Octanoate ◽  
Limiting Equivalent Conductances

Equivalent conductances, densities, and viscosities of aqueous solutions of sodium octanoate have been determined at 25° and 35 °C, at concentrations ranging from 0.0002 M to 2.8 M. The limiting equivalent conductances of the octanoate ion have been determined as 23.08 mhos and 29.09 mhos, at 25° and 35 °C respectively.Comparison has been made of our experimental conductances with those calculated, using the equations of Robinson–Stokes, of Falkenhagen–Leist, and of Fuoss.No evidence has been found of micelle formation in solutions of sodium octanoate.

scholarly journals ON GUAIACOL SOLUTIONS

1934 ◽  
Vol 17 (4) ◽  
pp. 549-561 ◽  
Author(s):  
Theodore Shedlovsky ◽  
Herbert H. Uhlig
Keyword(s):  
Electrical Conductivity ◽  
Dissociation Constants ◽  
Dielectric Constants ◽  
Conductivity Measurements ◽  
Ionic Equilibrium ◽  
Weak Electrolytes ◽  
Ionic Mobilities ◽  
Water Saturated ◽  
Limiting Equivalent Conductances ◽  
Sodium And Potassium

1. Measurements on the densities, viscosities, dielectric constants, and specific conductances of pure anhydrous and water-saturated guaiacol at 25°C. are reported. 2. The solubility of water in guaiacol at 25°C., and its effect on the electrical conductivity of a sodium guaiacolate solution is given. 3. Electrical conductivity measurements are reported on solutions of sodium and potassium guaiacolates in water-saturated guaiacol at 25°C. 4. The decrease of electrical conductivity with increasing concentration for these salts is explained on the basis of an ionic equilibrium combined with the interionic attraction theory of Debye and Hückel. 5. The limiting equivalent conductances of sodium and potassium guaiacolates in water-saturated guaiacol at 25°C., the corresponding limiting ionic mobilities, and the dissociation constants are computed from the conductivity measurements. The salts are found to be weak electrolytes with dissociation constants of the order of 5 x 10–6.

The Limiting Equivalent Conductances of Hydrogen Chloride and Ammonium Chloride in Dimethylformamide

1952 ◽  
Vol 99 (1) ◽  
pp. 28 ◽  
Author(s):  
L. R. Dawson ◽  
M. Golben ◽  
G. R. Leader ◽  
H. K. Zimmerman
Keyword(s):  
Hydrogen Chloride ◽  
Ammonium Chloride ◽  
Limiting Equivalent Conductances

Conductance studies in amide–water mixtures. VI. Nitrates of sodium, potassium, and ammonium in N,N-dimethylformamide–water mixtures at 25 °C

1984 ◽  
Vol 62 (6) ◽  
pp. 1051-1056 ◽  
Author(s):  
Lal Bahadur ◽  
M. V. Ramanamurti
Keyword(s):  
Association Constant ◽  
Solvent Mixture ◽  
Dielectric Constants ◽  
Solvent Mixtures ◽  
Walden Product ◽  
Sodium Potassium ◽  
Conductance Data ◽  
Walden Products ◽  
Pass Through ◽  
Limiting Equivalent Conductances

Conductance data for the nitrates of sodium, potassium, and ammonium in N,N-dimethylformamide (DMF) – water mixtures (74.39 ≥ D ≥ 36.11) at 25 °C are reported for the concentration range 0.0003–0.06 mol dm−3. Also densities, viscosities, and dielectric constants of the solvent mixture (DMF–water) are reported at the same temperature. The data have been analysed by the Fuoss (1978) equation excluding the term α. The existence of a maximum in the viscosity at a 1:3 mol ratio of DMF and water is attributed to the formation of a solvated complex DMF•3H2O. The Walden products for all the three salts pass through a maximum while the equivalent conductances show a minimum with the change of DMF content in the solvent mixtures. In any given solvent mixture, the limiting equivalent conductances show the trend NaNO3 < KNO3 < NH4NO3. The existence of a maximum in Walden product is attributed to the dehydration of ions due to presence of the cosolvent (DMF). For all the three salts, the association constant was negligible (KA < 10) in all the solvent mixtures studied.

THE ELECTRICAL CONDUCTIVITIES OF SOME TETRA-n-ALKYLAMMONIUM SALTS IN ACETONITRILE

1965 ◽  
Vol 43 (5) ◽  
pp. 1215-1221 ◽  
Author(s):  
A. C. Harkness ◽  
H. M. Daggett Jr.
Keyword(s):  
Dissociation Constants ◽  
Relative Order ◽  
Electrical Conductivities ◽  
Ionic Conductances ◽  
Order Of Magnitude ◽  
Alkylammonium Salts ◽  
Ion Size ◽  
Limiting Equivalent Conductances

The conductances of a number of tetra-n-alkylammonium bromides and iodides have been measured in acetonitrile. Limiting equivalent conductances and dissociation constants have been evaluated by two methods. Limiting equivalent ionic conductances have been evaluated from these results. Correlations have been made of the effect of ion size on the ionic conductances and on the relative order of magnitude of the dissociation constants. In an appendix the limiting ionic conductances of a number of other ions have been collected from the existing literature.

THE LIMITING EQUIVALENT CONDUCTANCES OF AMMONIUM CHLORIDE, AMMONIUM BROMIDE, AND AMMONIUM NITRATE AT 35.00 °C.

1958 ◽  
Vol 36 (2) ◽  
pp. 330-338 ◽  
Author(s):  
A. N. Campbell ◽  
E. Bock
Keyword(s):  
Aqueous Solutions ◽  
Ammonium Nitrate ◽  
Ammonium Chloride ◽  
Stokes Equation ◽  
Probable Error ◽  
Ammonium Bromide ◽  
Conductance Data ◽  
Ionic Conductances ◽  
Hydrolysis Of ◽  
Limiting Equivalent Conductances

The limiting equivalent conductances of ammonium chloride, ammonium bromide, and ammonium nitrate as well as the limiting ionic conductances of the ammonium and nitrate ions were determined at 35 °C. with a probable error of 0.05%. The values found were [Formula: see text] 180.97 mhos, [Formula: see text] 182.73 mhos, [Formula: see text] 174.21 mhos, [Formula: see text] 88.73 mhos, and [Formula: see text] 85.48 mhos. These values were obtained by the application of the Shedlovsky method of extrapolation to equivalent conductance data, which had been corrected for the hydrolysis of the ammonium ion.Observed equivalent conductances of aqueous solutions of ammonium nitrate at 35 °C., in the concentration range from 0.0002 N to 10 N, have been compared with those calculated by means of the Wishaw–Stokes and Falkenhagen–Leist equations. The Wishaw–Stokes equation was found to give better agreement with experiment than the Falkenhagen–Leist equation.

CONDUCTANCES OF AQUEOUS SOLUTIONS OF SODIUM HEXANOATE (SODIUM CAPROATE) AND THE LIMITING CONDUCTANCES OF THE HEXANOATE ION, AT 25 °C AND 35 °C

1960 ◽  
Vol 38 (10) ◽  
pp. 1939-1945 ◽  
Author(s):  
A. N. Campbell ◽  
J.I. Friesen
Keyword(s):  
Molecular Weight ◽  
Aqueous Solutions ◽  
Stokes Equation ◽  
Apparent Molecular Weight ◽  
Ionic Micelles ◽  
Limiting Conductances ◽  
Limiting Equivalent Conductances

The equivalent conductances, densities, and viscosities of aqueous solutions of sodium hexanoate have been determined at 25 °C and 35 °C at concentrations ranging from 0.0003 M to saturation.The limiting equivalent conductances of the hexanoate ion have been determined as 27.37 ± 0.04 mhos at 25 °C and 34.69 ± 0.05 mhos at 35 °C.The Robinson–Stokes and the Falkenhagen–Leist equations have been applied to the data. The Robinson–Stokes equation reproduces the data within 0.7 mho up to 0.5 M at 25 °C when å = 13 Å. At 35 °C the data are reproduced within 0.5 mho up to 0.05 M with å = 10 Å. The Falkenhagen–Leist equation reproduces the data at 25 °C within 0.4 mho up to 0.1 M with å = 5.5 Å. An å = 4.0 Å reproduces the 35 °C data within 0.5 mho up to 0.05 M.From the form of the conductance curves and from an estimation of the apparent molecular weight it was concluded that the hexanoate ion does not form ionic micelles.

Solubility of simple aluminium compounds expected in soils. II. Hydrolysis and conductance of Al3+

Soil Research ◽  
1963 ◽  
Vol 1 (1) ◽  
pp. 36 ◽  
Author(s):  
M Raupach
Keyword(s):  
Aluminium Hydroxide ◽  
Aluminium Chloride ◽  
Salt Solutions ◽  
Chloride Solutions ◽  
Aluminium Salt ◽  
Potentiometric Measurements ◽  
Limiting Equivalent Conductances

The results of conductimetric measurements on dilute aluminium chloride solutions at 25� were found to be best fitted by the limiting equivalent conductances A01/3Al3 + = A01/2AlOH2+ = 58.2 with the parameter for ionic diameter 6.0A and by *K1 = log [(AlOH2+)(H+)/(Al3+)] = - 5.05 when it was assumed that AlOH2+ and H+ concentrations produced by hydrolysis were equal in the measured solutions. Potentiometric measurements and calculations from solubility work gave *K1 = -5.00 and -4.97 respectively. After small changes, e.g. by aging, dilute aluminium salt solutions conform to the solubility expression for aluminium hydroxide, log [(AlOH2+) (OH-)2] = -23.31.

The Limiting Equivalent Conductances of Aqueous Barium Alkanesulfonates.

1951 ◽  
Vol 55 (9) ◽  
pp. 1499-1502 ◽  
Author(s):  
L. R. Dawson ◽  
M. Golben ◽  
G. R. Leader ◽  
H. K. Zimmerman
Keyword(s):  
Limiting Equivalent Conductances
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