To calculate ΔG for an ion, you simply add the equations for the chemical and electrostatic components together. ΔG=RTln((C2)/(C1))+ZFVm. Say you are trying to move Ca(2)(+). Which equation would you use for the calculation of ΔG?

a. ΔG=RTln((C2)/(C1))+ZFVm
b. ΔG=RTln((C2)/(C1))
c. ΔG=ZFVm
d. ΔG=RTln((C2)/(C1))+ZVm