[trinhn812]

Many biochemical reactions that occur in cells require relatively high
concentrations of potassium ion (k+). The concentration of K+ in muscle
cells is about 0.15 M. The concentration of K+ in blood plasma is about
0.0050 M. The high internal concentration in cells is maintained by
pumping K+ fron plasma. How much work must be done to transport 1.0 mol
of K+ from the blood to the inside of a muscle cell at 37C, normal body
temperature?

So I know work (max) is = delta G.

I'm thinking of using the equation  delta G = -RTln(K)

So does anybody have an idea of how to caculate K? Is it (.15/.0050)?