Table 8 The calculated activity coefficient of ACP, ln \(\gamma_{1}^{{}}\), based on Wilson model in aqueous PILs solutions at different temperatures respectively

2.8782

3.1888

3.2289

3.2234

2.4783

2.7698

2.8317

2.9398

2.3057

2.6438

2.7629

2.8614

2.1317

2.4737

2.6216

2.7119

2.0105

2.4243

2.477

2.6029

1.8845

2.2632

2.351

2.4295

1.7674

2.1845

2.2624

2.3331

3.2139

3.1898

3.2299

3.2243

2.9108

2.8485

2.8973

3.0132

2.6667

2.7223

2.7983

2.8848

2.5829

2.6167

2.7360

2.8186

2.4747

2.5562

2.5980

2.6664

2.3665

2.4671

2.5461

2.5974

2.2833

2.3452

2.4221

2.5041

3.2111

3.1868

3.2286

3.2237

3.0520

3.0278

3.0861

3.1223

2.8705

2.9168

2.9970

3.0669

2.7560

2.7547

2.8879

2.9577

2.6943

2.6569

2.7271

2.8550

2.4519

2.5731

2.5706

2.6860

2.3602

2.4305

2.4828

2.5757