CHEM-C 127 Lecture Notes - Lecture 4: Graduated Cylinder, Standard Deviation, Observational Error
Document Summary
C127 lecture 5 notes- density and data analysis. Learn how to design an experiment to give best possible results. Learn how to use standard deviation to examine quality of data sets. Learn how to use t-test in excel to decide if 2 experiments gave same or different results. Safety/waste disposal: goggles and appropriate clothing required, all solutions can be put down sink with plenty of water. (cid:1856)(cid:1857)(cid:1866)(cid:1871)(cid:1872) (cid:4672)(cid:3040)(cid:4673)= (cid:3040)(cid:3046)(cid:3046) (cid:3049)(cid:3042)(cid:3039)(cid:3048)(cid:3040: 2 solutions with different amounts. Lab info: measure 2 unknowns, use t-test to make hypothesis to say whether solutions are the same density. For this lab, density concept not very important; focusing on analyzing data sets: to get accurate data we need: Accurate mass- analytical balances (with doors on sides) go to 4 decimal places- keep in mind they have mass limit. Accurate volume- choose glassware based on what is available/best-suited. Beakers- mass produced; measurements very very approximate; never measure with beakers.
