Physical Chemistry Nonideal Solutions Activity and Activity Coefficients a =e 12=l1 exp RT every solution (10.3) The activity a; is a measure of the chemical potential u;in the solution 个.a.个 Like the chemical potential, ai is a measure of the escaping e tendency of i from the solution The activity a is more convenient to use in numerical calculations than u, 1010 Activity and Activity Coefficients Nonideal Solutions Like the chemical potential, ai is a measure of the escaping tendency of i from the solution. The activity ai is a measure of the chemical potential i in the solution. ,  . i i  a The activity a i is more convenient to use in numerical calculations than i         − = RT a o i i i   exp every solution (10.3) Physical Chemistry