Accession Number:

AD0404239

Title:

THE EFFECT OF PRESSURE ON THE EQUILIBRIUM OF MAGNESIUM SULFATE,

Descriptive Note:

Corporate Author:

SCRIPPS INSTITUTION OF OCEANOGRAPHY SAN DIEGO CALIF MARINE PHYSICAL LAB

Personal Author(s):

Report Date:

1962-02-16

Pagination or Media Count:

5.0

Abstract:

Conductivity at 25 deg. of aqueous solutions of MgSO4 has been measured as a function of pressure up to 2000 atm. for five concentrations from 0.0005 to 0.02 M. The effect of pressure on the dissociation constant was calculated with the equation used by Davies, Otter, and Prue. The difference of partial molal volumes between products and reactants, was found to be -7.3 0.4 cc.mole. The relation of this work to results of sound absorption measurements in MgSO4 solutions is pointed out. Measurements of the effect of pressure on conductivity also were made for the following aqueous solutions KCl, K2SO4, MgCl2, and NaCl at 25 deg. over the same concentration range. Values of equivalent conductivity at infinite dilution, , were determined as a function of pressure for MgSO4, KCl, K2SO4, and MgCl2. Values of are given for MgSO4, KCl, K2SO4, and MgCl2 at each concentration. Since -6.4 cc.mole for MgSO4, the partial molal volume of the state which dissociates into ions is 1 cc.mole. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE