Here is a small excel-file to solve the gravity-test at the new Dr.Sloth-Plot... This is for the latest step, when your are in a room like this: The Excel-Book looks like this, you have to fill in A1 and A2... well just have a look at the description in the file.
guys use the jellyneo's one it's much more extensive and for the acid test use this: http://www.neopets.com/~SchwoazzaToifl for the acid creation part it's not 100% but it's close on most