Which of the ions in the table would have the greatest and t

Which of the ions in the table would have the greatest and the least electrochemical gradient? Be sure to briefly explain why! f

200 = 800/( 1 +7e^-3x)

divide both sides by 200

1 = 4/(1 +7e^-3x)

multiply both sides by (1 +7e^-3x)

1 +7e^-3x = 4

7e^-3x = 3

e^-3x = (3/7)

take natural log on both sides:

ln(e^-3x) = ln(3/7)

-3x = ln(3/7)

x = - [ln(3/7)]/3