An electrochemical potassium gradient is established across a synthetic lipid membrane. The concentration of potassium on the outside of the membrane is 5 mM. The concentration of potassium on the inside of the membrane is 150 mM. In RT [K The Nernst equation is: Ek ZF [KM] Where R=1.99 cal.k1.mol-1, T = 298 K, z = +1, F= 23,062 cal.mol-1.v1 1. What is the equilibrium membrane potential for potassium (EK)? The overall free energy of this potassium gradient (AGK) was-4022 cal.mor1 and the contribution to this from the electrical component was -2006 cal.mol-1 2. What was the free energy contribution from the chemical component of the gradient