Table 3 Experimental and calculated densities \(\rho\) and viscosities \(\eta\) at T = 293.15 K for KCl (1) + CaCl2 (2) + H2O (3) system.

From: Experimental measurements and modelling of viscosity and density of calcium and potassium chlorides ternary solutions

m1 (mol kg−1)

Experimental data

Calculated viscosity (mPa s)

Predicted density

\(\rho\) (g cm−3)

\(\eta\) (mPa s)

Equation (5)

Hu’s model

\(\rho\) (g cm−3)

   

m2 = 0.5

  

0.5

1.0635

1.1645

1.1455

1.1377

1.0609

1.0

1.0838

1.1614

1.1484

1.1425

1.0811

1.5

1.1031

1.1583

1.1553

1.1508

1.1005

2.0

1.1216

1.1679

1.1657

1.1616

1.1190

2.5

1.1435

1.1841

1.1796

1.1749

1.1369

3.0

1.1565

1.1926

1.1976

1.1917

1.1540

3.5

1.1726

1.2045

1.2165

1.2092

1.1704

   

m2 = 1.0

  

0.5

1.1035

1.3347

1.3231

1.3307

1.1024

1.0

1.1217

1.3284

1.3344

1.3426

1.1214

1.5

1.1409

1.3310

1.3491

1.3563

1.1395

2.0

1.1576

1.3500

1.3703

1.3754

1.1572

2.5

1.1744

1.3782

1.3902

1.3924

1.1735

3.0

1.1903

1.3862

1.4157

1.4148

1.1895

   

m2 = 1.5

  

0.5

1.1406

1.5371

1.5378

1.5551

1.1426

1.0

1.1583

1.5604

1.5577

1.5727

1.1600

1.5

1.1755

1.5799

1.5803

1.5925

1.1766

2.0

1.1918

1.5867

1.6080

1.6171

1.1928

2.5

1.2076

1.6007

1.6388

1.6449

1.2083

   

m2 = 2.0

  

0.5

1.1775

1.8036

1.8004

1.8123

1.1796

1.0

1.1933

1.8231

1.8283

1.8394

1.1957

1.5

1.2094

1.8428

1.8596

1.8705

1.2111

2.0

1.2249

1.8654

1.8987

1.9099

1.2265

   

m2 = 2.5

  

0.5

1.2117

2.1489

2.1225

2.1234

1.2132

1.0

1.2270

2.1653

2.1583

2.1657

1.2282

1.5

1.2423

2.1989

2.1986

2.2136

1.2430

   

m2 = 3.0

  

0.5

1.2439

2.5305

2.5226

2.5215

1.2440

1.0

1.2586

2.5733

2.5661

2.5842

1.2585

   

m2 = 3.5

  

0.5

1.2740

3.0547

3.0233

3.0405

1.2729

0.1

1.2888

3.1415

3.0761

3.1306

1.2875

   

m2 = 4.0

  

0.5

1.3038

3.7359

3.6613

3.7183

1.3012

   

AAD% = 0.97

AAD% = 1.07

AAD% = 0.13

   

SD = 0.0255

SD = 0.0201

SD = 0.0020

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