The activity coefficients of NaBr in the system NaBr - NaAc - H_2O at 298. 15K were determined from EMF measurements at constant total ionic strengths of 0. 1, 0. 5, 1. 0, 1. 5, 2. 0, 2. 5 and 3. 0 mol/kg.是什么意思_The activity coefficients of NaBr in the system NaBr - NaAc - H_2O at 298. 15K were determined from EMF measurements at constant total ionic strengths of 0. 1, 0. 5, 1. 0, 1. 5, 2. 0, 2. 5 and 3. 0 mol/kg.在线翻译_英语_读音_用法_例句