IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Sea Water

Components:
   (1) Sea Water; ; []  NIST Chemistry WebBook for detail
   (2) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail

Original Measurements:
   Li, Y.-H.; Tsui, T.-F., J. Geophys. Res. 1971, 76, 4203-7.

Variables:
   Temperature = 273.85 K to 303.15 K
   Pressure = 101.325 kPa
   Concentration = Chlorinity = 0.0 - 29.0 %

Prepared By:
   Kelly R. Thornton

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)


t/°C	T/K	10² * Keunen coefficient, S [mol atm/L]	S Note	Chlorinity
0.7	273.85 (a)	7.501	b	0
4.0	277.15	6.603	b	0
10.2	283.35	5.302	b	0
20.0	293.15	3.911	b	0
30.0	303.15	2.997	b	0
10.2	283.35	4.863	b	10.0
4.0	277.15	5.526	b	20.0
10.2	283.35	4.482	b	20.0
20.0	293.15	3.359	b	20.0
30.0	303.15	2.614	b	20.0
4.0	277.15	5.086	b	29.0
10.2	283.15	4.162	b	29.0
20.0	293.15	3.138	b	29.0
30.0	303.15	2.463	b	29.0
4.0	277.15	5.547	b	0.6413 m NaCl
20.0	293.15	3.358	b	0.6413 m NaCl
30.0	303.15	2.618	b	0.6413 m NaCl

Notes:
   ^a  Calculated by the compiler.
   ^b  S₁ = solubility of CO₂

Method/Apparatus/Procedure:
   Water-saturated CO₂ gas was bubbled overnight through sea water in an equilibration chamber in a constant temperature bath. A sample was removed with an airtight glass syringe and injected into a CO₂-extraction system. Infra-red analysis was done on liberated CO₂. Sea water samples were acidified with 8 M HCl to a pH below 3.

Source and Purity of Materials:
   (1) Carbon dioxide. Source not given. Purity of 99.99 ± 0.01 %.
   (2) Sea water. Source not given.

Estimated Errors:

   Temperature: δT/K = ± 0.02
   Pressure: δP_{1_{/mmHg = ± 0.005}}