You have two springs. one has a greater spring constant than the other. you also have two objects, one with a greater mass than
the other. which object should be attached to which spring, so that the resulting spring-object system has the greatest possible period of oscillation?
The point is that water is moving smoothly but that the solutes are not.Even though the containers are chemically different (chemical disequilibrium), once all the solutes in one container are contrasted to all the solutes in another container, both have the same total solutes concentrations (this means that they are in osmotic balance).