Predicted grade

Hi guys, I was predicted AAB for my a levels with the b in geography (I take bio, chem and geog) Should I asked for my grade to be raised to an A in geography and an A* in chemistry. I would like to go to the uni of Liverpool to study chemistry and the boundaries are ABB. I don’t want to apply to be rejected due to my predicted grades being too high but I genuinely believe I can get an A* in chem. for example, my most recent chem test I got an A with no revision and a B in a mock with day of revision. I would genuinely love an A* in chemistry but idk if it will reduce my chances of UoL Any thoughts 👩‍🔬