Table 8 Experimental and calculated densities \(\rho\) and Viscosities \(\eta\) at T = 318.15 K for KCl (1) + CaCl₂ (2) + H₂O (3) SYSTEM.

m₁ (mol kg⁻¹)	Experimental data		Calculated viscosity (mPa s)		Predicted density
m₁ (mol kg⁻¹)	\(\rho\) (g cm⁻³)	\(\eta\) (mPa s)	Equation (5)	Hu’s model	\(\rho\) (g cm⁻³)
			m₂ = 0.5
0.5	1.0539	0.7214	0.7087	0.7140	1.0566
1.0	1.0735	0.7345	0.7207	0.7272	1.0764
1.5	1.0923	0.7434	0.7331	0.7408	1.0950
2.0	1.1101	0.7537	0.7458	0.7547	1.1128
2.5	1.1272	0.7656	0.7591	0.7691	1.1299
3.0	1.1435	0.7851	0.7739	0.7846	1.1465
3.5	1.1588	0.8057	0.7887	0.7994	1.1626
			m₂ = 1.0
0.5	1.0925	0.8341	0.8258	0.8474	1.0955
1.0	1.1105	0.8404	0.8405	0.8612	1.1133
1.5	1.1276	0.8566	0.8552	0.8751	1.1305
2.0	1.1441	0.8865	0.8720	0.8911	1.1477
2.5	1.1592	0.8970	0.8866	0.9045	1.1639
3.0	1.1737	0.9077	0.9035	0.9197	1.1802
			m₂ = 1.5
0.5	1.1283	0.9716	0.9647	0.9895	1.1307
1.0	1.1447	0.9840	0.9822	1.0043	1.1480
1.5	1.1600	0.9917	0.9993	1.0190	1.1649
2.0	1.1746	1.0251	1.0176	1.0347	1.1818
2.5	1.1883	1.0496	1.0363	1.0504	1.1987
			m₂ = 2.0
0.5	1.1619	1.1300	1.1319	1.1481	1.1653
1.0	1.1765	1.1653	1.1518	1.1649	1.1827
1.5	1.1902	1.1680	1.1717	1.1818	1.2000
2.0	1.2032	1.1964	1.1945	1.2009	1.2180
			m₂ = 2.5
0.5	1.1935	1.3299	1.3340	1.3374	1.1998
1.0	1.2064	1.3538	1.3563	1.3571	1.2180
1.5	1.2183	1.3826	1.3792	1.3767	1.2365
			m₂ = 3.0
0.5	1.2237	1.5666	1.5818	1.5763	1.2344
1.0	1.2347	1.6321	1.6063	1.5984	1.2538
			m₂ = 3.5
0.5	1.2528	1.8659	1.8879	1.8827	1.2682
1.0	1.2619	1.9129	1.9156	1.9053	1.2894
			m₂ = 4.0
0.5	1.2812	2.2479	2.2726	2.2750	1.3005
			AAD% = 0.90	AAD% = 0.99	AAD% = 0.39
			SD = 0.0130	SD = 0.0138	SD = 0.0054

The standard uncertainties (u) are u(T) = 0.02 K, u(m) = 1.0 × 10⁻⁴ mol kg⁻¹. The combined expanded uncertainty (U_c) are U_c(ρ) = 5.0 × 10⁻⁵ g cm⁻³ (0.95 level of confidence) and U_c(\(\eta\)) = 0.003 mPa s (0.95 level of confidence).

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