版权所有：华东理工大学物理化学教研室 12 where the activity coefficient, γ, depends on the composition, molality, and T of the solution. As the solution approaches ideality at low molalities, the activity coefficient tends towards 1: → → bbba →0 as / and 1 o γ 10.2 Ion activities 1) The definition of activity o = γ / bba版权所有：华东理工大学物理化学教研室 12 where the activity coefficient, γ, depends on the composition, molality, and T of the solution. As the solution approaches ideality at low molalities, the activity coefficient tends towards 1: → → bbba →0 as / and 1 o γ 10.2 Ion activities 1) The definition of activity o = γ / bba