If you have a higher concentration gradient of water and a low concentration of sucrose solution, then more water partials will diffuse through osmosis through a partially permeable membrane, in order to balance it out if you get what i mean. Because it goes from a high concentration to a low concentration, and its only water that moves so the more of the concentration of water the more it will diffuse in order to balance out the other partical usually sucrose. And therefore it would happen at a much faster rate as their is more of that substance,
Hope this helps!
Correct me if I'm wrong anyone lol.