Table 12. Error Analysis for the NaOH–Na₂SO₄–H₂O System.

	experimental results, solubility/mol·kg–1 H2O			calculated results
T/K	NaOH	Na2SO4	solid phases	NaOH	Na2SO4	dPa/%
363.15	0.00	3.00	Na2SO4		3.15	4.92
	2.29	2.28	Na2SO4		1.99	12.41
	3.76	1.57	Na2SO4		1.48	6.14
	5.08	1.20	Na2SO4		1.12	6.31
	5.84	0.93	Na2SO4		0.96	3.50
	7.13	0.58	Na2SO4		0.74	26.00
	9.14	0.50	Na2SO4		0.49	3.32
	11.24	0.26	Na2SO4		0.31	20.80
	13.44	0.25	Na2SO4 + Na2SO4·NaOH	13.41	0.25	0.16	0.00
	15.55	0.29	Na2SO4 + Na2SO4·NaOH	15.64	0.29	0.59	0.00
	15.74	0.27	Na2SO4 + Na2SO4·NaOH	15.71	0.27	0.20	0.00
	18.35	0.21	Na2SO4 + Na2SO4·NaOH	18.39	0.21	0.24	0.00
	20.24	0.29	Na2SO4 + Na2SO4·NaOH	20.12	0.29	0.57	0.00
	46.45	0.51	Na2SO4 + Na2SO4·NaOH	46.52	0.51	0.16	0.00
	69.86	0.76	Na2SO4 + Na2SO4·NaOH	69.82	0.75	0.76	0.06
	80.40	0.00	NaOH	80.40		0.00
average						5.38	5.22

^adP = (1/N)∑|P_exp – P_cal|/P_exp × 100%.