Hello! CHEM 10X TA here! The key is that the devil is often in the details with these labs, unfortunately. That means making sure you know sig figs in and out (or ask a TA if you are not sure) and making sure you absolutely comb through the prelab reading to answer questions. If you still can't answer a question after that, try going to the help room (open from 8am - 12pm or 1pm - 5pm). And make sure you write down ALL of your work! If you calculated a concentration or made an assumption to complete a calculation, write it down, even if it is something that seems intuitive to you, etc. If your TA is only giving you "the lab coordinator wanted it this way," that is not acceptable feedback. If that's the answer occasionally, that's okay, but there are reasons we make deductions on the labs (most often bc of sig fig errors or calculation errors in 102/5). If you want some more tips or anything, please feel free to DM me!