Sum frequency generation of water on NaCl, NaNo3, KHSO4, HCl, HNO3, and H2SO4 aqueous solutions

Article Abstract:

Issues concerning the use of sum frequency generation to examine the vapor-liquid interface of aqueous inorganic salt and acid solutions are presented.

Chemistry, Physical and theoretical, Physical chemistry

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Effect of H2SO4 and alkali metal SO(sub 4) (supra 2-)/HSO4- salt solutions on surface water molecules using sum frequency generation

Article Abstract:

A spectroscopic study was conducted to investigate the vibrational structure of water molecules at the surface of aqueous ionic solutions using sum frequency generation. Results of the study show that the orientation of surface water molecules is influenced by the composition of the bulk solution. Dissolved, non surface-active ions re-orient water at the interface. Experimental methodology and findings are presented.

Influence, Water, Molecules, Ionic solutions

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Phase transitions in emulsified HNO3/H2O and HNO3/H2SO4/H2O solutions

Article Abstract:

The differential scanning calorimetry was used to study the transition of emulsified binary HNO3/H2O and HNO3/H2SO4/H2O acid solutions from the liquid to the solid phase to determine the mechanism of ice formation from stratospheric aerosols. Results showed that binary solution droplets with less than 33 wt% HNO3 turn in to ice ar 37-65K, while those with higher concentrations form glasses instead of freezing. Results also indicated that the formation of ice particles from ternary aerosols at stratospheric temperatures require an ice saturation ratio of over 1.65.

Aerosols, Chemical reactions

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