TY - JOUR
T1 - The activities of potassium chloride and of water in Dead Sea brine
AU - Marcus, Y.
PY - 1977/12
Y1 - 1977/12
N2 - The activities of KCl and of H2O in Dead Sea water were estimated according to several approaches dealing with multicomponent electrolyte solutions. The activity of H2O, both measured directly via its vapor pressure and calculated theoretically, is 0.754 ± 0.004 for brine of density 1.207 ± 0.003gcm-3 at 25°C. The mean ionic activity of KCl in this brine ranges from 0.876 to 1.199 according to various treatments. These correspond to binary aqueous solutions 8.6-12.1 times richer than the brine. The brine cannot be simultaneously in equilibrium with respect to both H2O and KCl with such binary solutions, so a hypothetically perfect semipermeable membrane cannot lead to a state of equilibrium between the brine and aqueous KCl of any concentration.
AB - The activities of KCl and of H2O in Dead Sea water were estimated according to several approaches dealing with multicomponent electrolyte solutions. The activity of H2O, both measured directly via its vapor pressure and calculated theoretically, is 0.754 ± 0.004 for brine of density 1.207 ± 0.003gcm-3 at 25°C. The mean ionic activity of KCl in this brine ranges from 0.876 to 1.199 according to various treatments. These correspond to binary aqueous solutions 8.6-12.1 times richer than the brine. The brine cannot be simultaneously in equilibrium with respect to both H2O and KCl with such binary solutions, so a hypothetically perfect semipermeable membrane cannot lead to a state of equilibrium between the brine and aqueous KCl of any concentration.
UR - http://www.scopus.com/inward/record.url?scp=0043242863&partnerID=8YFLogxK
U2 - 10.1016/0016-7037(77)90205-8
DO - 10.1016/0016-7037(77)90205-8
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AN - SCOPUS:0043242863
SN - 0016-7037
VL - 41
SP - 1739
EP - 1744
JO - Geochimica et Cosmochimica Acta
JF - Geochimica et Cosmochimica Acta
IS - 12
ER -