The Vapor Pressure of Aqueous Solutions of Sulfuric Acid

Shankman, S.; Gordon, A. R.

doi:10.1021/ja01878a030

Cited by 36 publications

(17 citation statements)

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“…A similar procedure is described by Taylor and Rowlinson in their determination of the activity of glucose(aq). 103 Shankman and Gordon 104 improved the method and procedures in a determination of the activity of water in sulfuric acid(aq) at 298.15 K over the range 0 ¡ m j /mol kg 21 ¡ 22.63, the activity of water falling remarkably to 0.0538. The experimental results were analysed using eqn.…”

Section: Activity Of Water Determinationmentioning

confidence: 99%

Activity of water in aqueous systems; A frequently neglected property

et al. 2005

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In this critical review, the significance of the term 'activity' is examined in the context of the properties of aqueous solutions. The dependence of the activity of water(,) at ambient pressure and 298.15 K on solute molality is examined for aqueous solutions containing neutral solutes, mixtures of neutral solutes and salts. Addition of a solute to water(,) always lowers its thermodynamic activity. For some solutes the stabilisation of water(,) is less than and for others more than in the case where the thermodynamic properties of the aqueous solution are ideal. In one approach this pattern is accounted for in terms of hydrate formation. Alternatively the pattern is analysed in terms of the dependence of practical osmotic coefficients on the composition of the aqueous solution and then in terms of solute-solute interactions. For salt solutions the dependence of the activity of water on salt molalities is compared with that predicted by the Debye-Hü ckel limiting law. The analysis is extended to consideration of the activities of water in binary aqueous mixtures. The dependence on mole fraction composition of the activity of water in binary aqueous mixtures is examined. Different experimental methods for determining the activity of water in aqueous solutions are critically reviewed. The role of water activity is noted in a biochemical context, with reference to the quality, stability and safety of food and finally with regard to health science.

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Section: Activity Of Water Determinationmentioning

confidence: 99%

Activity of water in aqueous systems; A frequently neglected property

et al. 2005

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“…Initially, the molality of the reference solution should be as close as possible to that which will give the expected R.H. value for the salt; this will shorten the time it takes to reach equilibrium. Shankman and Gordon, 1939 Stokes and Levien, 1946 Stokes, 1947 Solomon, 1951 Stokes and Robinson, 1951 midity are explained both with an emphasis on accuracy :and on ease and convenience for use. Of various indirect methods of determining animal numbers, no technique has been so widely utilized as the Lincoln or proportional index method.…”

Section: Determination Of Relative Humiditymentioning

confidence: 99%

Saturated Solutions For the Control of Humidity in Biological Research

Winston

Bates

1960

Ecology

1,617

776

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“…But modern work with more adequate techniques has shown that precision can be achieved. Shankman & Gordon (1939) produced data for relative humidities at 25°C, which are adequate for the drawing of a curve. The new data of Stokes & Robinson (1949) agree very well with these, and cover almost the same range of humidity (5 per cent.-95 per cent.)…”

Section: Data For Solutions Of Sulphuric Acidmentioning

confidence: 99%

Control of Humidity with Potassium Hydroxide, Sulphuric Acid, or other Solutions

Solomon¹

1951

Bull. Entomol. Res.

514

160

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Methods of preparing solutions of graded density for the accurate control of atmospheric relative humidity are described, and some pitfalls in their use and in the use of saturated salt solutions are indicated.For graded solutions of potassium hydroxide and of sulphuric acid, data from the International Critical Tables or more recent sources are used as the basis of tables giving the concentrations (wt.%) and densities corresponding to relative humidities in steps of 5 per cent. R.H. Sources of similar data for calcium chloride, sodium hydroxide, sodium chloride, and glycerol solutions are given.As an addition to the compilation of the available data on humidities in contact with various saturated salt solutions by O'Brien (1948), some more recent figures are quoted.

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The Vapor Pressure of Aqueous Solutions of Sulfuric Acid

Cited by 36 publications

References 0 publications

Activity of water in aqueous systems; A frequently neglected property

Activity of water in aqueous systems; A frequently neglected property

Saturated Solutions For the Control of Humidity in Biological Research

Control of Humidity with Potassium Hydroxide, Sulphuric Acid, or other Solutions

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