1. The problem statement, all variables and given/known data I am working on a mass transfer problem and have this equation: d/dt(Vc1) = Ak[c1(sat) - c1] 2. Relevant equations Initial conditions: x=0, c1=0 3. The attempt at a solution I know that the result from integration should be: c1/c1(sat) = 1 – e-(kA/V)t But I don't understand the integration that got there. If someone could show me the steps, that would be very helpful! Thanks!