Raoult's Law Calculations

P/P^o = 1-X_i

_{P= water vapor pressure of solution}

P^o = vapor pressure of pure water

X _i = mole fraction of solute

Assumptions: Dilute Solution, non-interacting species

Glucose (g)	Water (g)	Moles G	Moles H2O	Mole Fraction	Aw
650	350	3.61	19.44	0.16	0.84
600	400	3.33	22.22	0.13	0.87
550	450	3.06	25.00	0.11	0.89
500	500	2.78	27.78	0.09	0.91
450	550	2.50	30.56	0.08	0.92
400	600	2.22	33.33	0.06	0.94
350	650	1.94	36.11	0.05	0.95
300	700	1.67	38.89	0.04	0.96
250	750	1.39	41.67	0.03	0.97
200	800	1.11	44.44	0.02	0.98
150	850	0.83	47.22	0.02	0.98
100	900	0.56	50.00	0.01	0.99
50	950	0.28	52.78	0.01	0.99
25	975	0.14	54.17	0.00	1.00
Sucrose	Water (g)	Moles S	Moles H2O	Mole Fraction	Aw
650	350	1.81	19.44	0.08	0.92
600	400	1.67	22.22	0.07	0.93
550	450	1.53	25.00	0.06	0.94
500	500	1.39	27.78	0.05	0.95
450	550	1.25	30.56	0.04	0.96
400	600	1.11	33.33	0.03	0.97
350	650	0.97	36.11	0.03	0.97
300	700	0.83	38.89	0.02	0.98
250	750	0.69	41.67	0.02	0.98
200	800	0.56	44.44	0.01	0.99
150	850	0.42	47.22	0.01	0.99
100	900	0.28	50.00	0.01	0.99
50	950	0.14	52.78	0.00	1.00
25	975	0.07	54.17	0.00	1.00
Glycerol	Water (g)	Moles G	Moles H2O	Mole Fraction	Aw
650	350	7.07	19.44	0.27	0.73
600	400	6.52	22.22	0.23	0.77
550	450	5.98	25.00	0.19	0.81
500	500	5.43	27.78	0.16	0.84
450	550	4.89	30.56	0.14	0.86
400	600	4.35	33.33	0.12	0.88
350	650	3.80	36.11	0.10	0.90
300	700	3.26	38.89	0.08	0.92
250	750	2.72	41.67	0.06	0.94
200	800	2.17	44.44	0.05	0.95
150	850	1.63	47.22	0.03	0.97
100	900	1.09	50.00	0.02	0.98
50	950	0.54	52.78	0.01	0.99
25	975	0.27	54.17	0.00	1.00
Propyleneglycol	Water (g)	Moles PG	Moles H2O	Mole Fraction	Aw
650	350	8.44	19.44	0.30	0.70
600	400	7.79	22.22	0.26	0.74
550	450	7.14	25.00	0.22	0.78
500	500	6.49	27.78	0.19	0.81
450	550	5.84	30.56	0.16	0.84
400	600	5.19	33.33	0.13	0.87
350	650	4.55	36.11	0.11	0.89
300	700	3.90	38.89	0.09	0.91
250	750	3.25	41.67	0.07	0.93
200	800	2.60	44.44	0.06	0.94
150	850	1.95	47.22	0.04	0.96
100	900	1.30	50.00	0.03	0.97
50	950	0.65	52.78	0.01	0.99
25	975	0.32	54.17	0.01	0.99
Erythritol	Water (g)	Moles E	Moles H2O	Mole Fraction	Aw
650	350	5.33	19.44	0.22	0.78
600	400	4.92	22.22	0.18	0.82
550	450	4.51	25.00	0.15	0.85
500	500	4.10	27.78	0.13	0.87
450	550	3.69	30.56	0.11	0.89
400	600	3.28	33.33	0.09	0.91
350	650	2.87	36.11	0.07	0.93
300	700	2.46	38.89	0.06	0.94
250	750	2.05	41.67	0.05	0.95
200	800	1.64	44.44	0.04	0.96
150	850	1.23	47.22	0.03	0.97
100	900	0.82	50.00	0.02	0.98
50	950	0.41	52.78	0.01	0.99
25	975	0.20	54.17	0.00	1.00
NaCl	Water (g)	Moles NaCl but 2 particles	Moles H2O	Mole fraction	Aw
650	350	11.12	19.44	0.36	0.64
600	400	10.27	22.22	0.32	0.68
550	450	9.41	25.00	0.27	0.73
500	500	8.56	27.78	0.24	0.76
450	550	7.70	30.56	0.20	0.80
400	600	6.84	33.33	0.17	0.83
350	650	5.99	36.11	0.14	0.86
300	700	5.13	38.89	0.12	0.88
250	750	4.28	41.67	0.09	0.91
200	800	3.42	44.44	0.07	0.93
150	850	2.57	47.22	0.05	0.95
100	900	1.71	50.00	0.03	0.97
50	950	0.86	52.78	0.02	0.98
25	975	0.43	54.17	0.01	0.99

Last Updated on 10/28/02
By Grady