Table 4 Experimental and calculated densities \(\rho\) and viscosities \(\eta\) at T = 298.15 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

1.0620

1.0495

1.0279

1.0224

1.0622

1.0

1.0819

1.0496

1.0353

1.0304

1.0818

1.5

1.1013

1.0497

1.0453

1.0407

1.1006

2.0

1.1197

1.0622

1.0578

1.0525

1.1186

2.5

1.1414

1.0738

1.0727

1.0658

1.1360

3.0

1.1544

1.0817

1.0910

1.0810

1.1530

3.5

1.1704

1.0991

1.1099

1.0956

1.1694

   

m2 = 1.0

  

0.5

1.1017

1.1979

1.1891

1.1974

1.1008

1.0

1.1195

1.1975

1.2043

1.2095

1.1192

1.5

1.1388

1.2134

1.2215

1.2222

1.1369

2.0

1.1555

1.2221

1.2438

1.2382

1.1546

2.5

1.1722

1.2692

1.2644

1.2509

1.1712

3.0

1.1880

1.3165

1.2895

1.2663

1.1878

   

m2 = 1.5

  

0.5

1.1387

1.3839

1.3829

1.3949

1.1381

1.0

1.1562

1.4057

1.4059

1.4090

1.1559

1.5

1.1733

1.4249

1.4304

1.4230

1.1731

2.0

1.1895

1.4350

1.4587

1.4388

1.1902

2.5

1.2028

1.4773

1.4891

1.4546

1.2071

   

m2 = 2.0

  

0.5

1.1750

1.6218

1.6190

1.6196

1.1747

1.0

1.1911

1.6724

1.6494

1.6363

1.1921

1.5

1.2069

1.6691

1.6819

1.6532

1.2093

2.0

1.2224

1.6944

1.7205

1.6734

1.2269

   

m2 = 2.5

  

0.5

1.2093

1.9398

1.9082

1.8903

1.2100

1.0

1.2245

1.9457

1.9458

1.9105

1.2276

1.5

1.2397

1.9879

1.9865

1.9305

1.2453

   

m2 = 3.0

  

0.5

1.2414

2.3071

2.2666

2.2336

1.2439

1.0

1.2560

2.3096

2.3112

2.2556

1.2621

   

m2 = 3.5

  

0.5

1.2713

2.7324

2.7131

2.6738

1.2760

1.0

1.2851

2.7906

2.7663

2.6938

1.2956

   

m2 = 4.0

  

0.5

1.3010

3.3480

3.2776

3.2354

1.3068

   

AAD% = 0.88

AAD% = 0.73

AAD% = 0.18

   

SD = 0.0212

SD = 0.0134

SD = 0.0031

  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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