Section: 6 | Vapor Pressure of Saturated Salt Solutions |

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VAPOR PRESSURE OF SATURATED SALT SOLUTIONS

This table gives the vapor pressure of water above saturated solutions of some common salts at temperature intervals from 10 °C to 40 °C. Data on pure water are given on the last line for comparison. Column definitions for the table are as follows.

Column heading	Definition
Name	Name of salt-forming saturated solution; salts are listed alphabetically by name
Mol. form.	Formula of salt-forming saturated solution
P_vap(10 °C), etc.	Vapor pressure of saturated solution at temperature specified in parentheses in °C, in kPa
Ref.	Reference for data values

The references provide additional information on activity coefficients, osmotic coefficients, and enthalpies of vaporization.

References

Apelblat, A., J. Chem. Thermodynamics, 24, 619, 1992. [https://doi.org/10.1016/S0021-9614(05)80033-3]
Apelblat, A., J. Chem. Thermodynamics, 25, 63, 1993. [https://doi.org/10.1006/jcht.1993.1008]
Apelblat, A., J. Chem. Thermodynamics, 25, 1513, 1993. [https://doi.org/10.1006/jcht.1993.1151]
Apelblat, A. and Korin, E., J. Chem. Thermodynamics, 30, 59, 1998. [https://doi.org/10.1006/jcht.1997.0275]

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Vapor Pressure of Saturated Solutions as a Function of Temperature

Name	Mol. form.	CAS Reg. No.	P_vap(10 ºC)/kPa	P_vap(15 ºC)/kPa	P_vap(20 ºC)/kPa	P_vap(25 ºC)/kPa	P_vap(30 ºC)/kPa	P_vap(35 ºC)/kPa	P_vap(40 ºC)/kPa	Ref.
Continued on next page...
Ammonium chloride	NH₄Cl	12125-02-9	0.971	1.328	1.836	2.481				2
Ammonium nitrate	NH₄NO₃	6484-52-2	0.853	1.152	1.524	1.972				2
Ammonium sulfate	(NH₄)₂SO₄	7783-20-2	0.901	1.319	1.871	2.573	3.439	4.474		3
Barium chloride	BaCl₂	10361-37-2	0.971	1.443	2.073	2.887	3.903	5.133	6.576	1
Calcium nitrate	Ca(NO₃)₂	10124-37-5	0.701	1.015	1.381	1.772	2.154	2.487		1
Copper(II) sulfate	CuSO₄	7758-98-7	1.113	1.574	2.189	2.996	4.037	5.363		3
Iron(II) sulfate	FeSO₄	7720-78-7	0.978	1.516	2.208	3.035	3.950	4.884		3
Lithium chloride	LiCl	7447-41-8	0.128	0.193	0.279	0.384				2
Magnesium nitrate	Mg(NO₃)₂	10377-60-3	0.726	0.999	1.339	1.749	2.231	2.782	3.397	1
Manganese(II) chloride	MnCl₂	7773-01-5	0.697	1.064	1.515	2.020	2.535	3.002		3
Potassium bromide	KBr	7758-02-3	0.953	1.338	1.853	2.533	3.419	4.563		3
Potassium carbonate	K₂CO₃	584-08-7	0.541	0.802	1.134	1.536	1.997	2.499	3.016	1
Potassium iodate	KIO₃	7758-05-6	1.100	1.564	2.177	2.970	3.979	5.236	6.778	4
Rubidium chloride	RbCl	7791-11-9	0.862	1.215	1.684	2.298	3.088	4.089	5.343	4
Sodium bromide	NaBr	7647-15-6	0.722	1.004	1.376	1.858	2.475	3.255	4.229	4
Sodium chloride	NaCl	7647-14-5	0.921	1.285	1.768	2.401	3.218	4.262	5.581	4
Sodium nitrate	NaNO₃	7631-99-4	0.884	1.244	1.719	2.335	3.121	4.109	5.333	4
Sodium nitrite	NaNO₂	7632-00-0	0.703	0.994	1.381	1.888	2.540	3.368	4.403	4
Zinc sulfate	ZnSO₄	7733-02-0	0.945	1.401	1.986	2.698	3.523	4.431	5.382	1

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VAPOR PRESSURE OF SATURATED SALT SOLUTIONS

References

Vapor Pressure of Saturated Solutions as a Function of Temperature

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