Welcome!About me...What Lab isExpectationsControl CenterControl Center AccountsControl Center Account Con’tSlide 8Slide 9Slide 10Calendar operationthe Tao of MoleculesPrimary goalsPowerPoint PresentationAtoms: They’re how life worksWho am I?SymbolizingColoring your worldViews of WaterInteracting with H2ODoing itHow to draw moleculesLet the exercise commence!Some words on JargonLet’s make sense togetherTA-lead discussionEvaporationClean up!Getting Control CenterSlide 30Slide 31Slide 32What’s an Assessor?What’s vocabulary homework?Some adviceSyllabusStuffPolicies & Grading80% of success is just showing up*Quiz next weekHomework – See the CONTROL CENTERFollow-up, extras, etc. (you can ignore)Great experimentsSlide 43Macro moleculesNon-newtonian fluids for funWater and iceWhy does Chemistry matter?Atoms: mainly emptySome perspectiveSlide 501Welcome!Contemplating the nuts & bolts of Life“It’s atoms all the way down”2About me...•This is my section. You are my people. •Do not expect things to be identical between this section and others in this course3What Lab is•Thinking, Understanding, Investigating, Evaluating•Not arrive, assembly line, leave•Manual pp. ix & xi should help•Not sync’ed with most lecture sections, but internally coherent & mutually reinforcingExpectations4• Read the lab manual BEFORE lab• Be ON TIME to class• PARTICIPATE• Complete the assignments (online, etc)• ParticipateControl Center•You will use this to access ALL the information for the course including the schedule, your homework and grades•You will NOT use D2L for much in this course other than submitting written work•If you don’t download, install and this program successfully and as soon as possible, it negatively impacts your chances of doing well in the course5Control Center Accounts •These are your homework accounts. It is where all the answers that you generate for your computer homework is stored. •Go to the Control Center Icon on the desk top•Be absolutely certain that you are selecting the correct one. You are in 181, so pick that one. If you pick the one for 184 (a different course) you will be creating an account in the wrong place. •The background for 181 Control Center is GREEN6Control Center Account Con’t•Once you have opened Control Center, select ‘create student account’ at the bottom left of the page7Control Center Account Con’t•That will bring you to the UA WebAuth page. Log in with your NetID and password 8Control Center Account Con’t•That will bring you to the UA WebAuth page. Log in with your NetID and password 9Control Center Account Con’t•This will bring you to this page•Enter your name and pick your section•Enter a password (NOT your UA Web Auth. Password. I have access to this data base and you don’t want me knowing your email password)•Click ‘Join Lab Section’ then hit LOG OUT of Web Auth and let the next person go1011Calendar operationClick for more info12the Tao of MoleculesThe feel of molecules The world they live inHow? Why?13Primary goals•Create understanding by observation, reasoning•Chemical foundations for the course:•Water & its properties•non-watery things•Know molecules as real & tangible things14From The Secret of Scent, Luca Turin p.28When a journalist asked the great physicist Richard Feynman what single sentence would best encapsulate all science so far if it were to be the sole surviving scrap of all we knew, he replied, “The world is made of atoms.”When a journalist asked the great physicist Richard Feynman what single sentence would best encapsulate all science so far if it were to be the sole surviving scrap of all we knew, he replied, “The world is made of atoms.”15Atoms: They’re how life works•DNA, RNA: C, H, N, O, P, [Mg++]•Carbs: C, H, O•Protein: C, H, N, O, (S), (P)What cannot be done with assemblages of these atoms cannot be done by living organisms, nor their cells, nor their spit, etc.16Who am I?•At birth, # protons = # electrons•Atoms seek completion, which means outermost electron set = 8 (hydrogen, helium it’s just 2)Freeman Fig. 2.1aOuter shell17SymbolizingAtoms & Molecules18Coloring your world19Views of WaterH2OHOHSee lab manual, p. 0-3(There will be a test)++-20Interacting with H2OTo your StructViewers!(Software tab of Control Center)21Doing itComputers, stationsWrite your group name down; otherwise you can’t retrieve your work!22How to draw moleculesCarbon Hydrogen Oxygen NitrogenFigure is from Lab Manual p. 0-523Let the exercise commence!Some words on Jargon•DON’T use it!•"If you can't explain it simply, you don't understand it well enough."– Albert Einstein•If you really understand something you should be able to explain it using simple, everyday language> That is what you will be required to do in this lab and for all the written work you will complete today and for homework•If you must use a ‘big, fancy word’, fine, but you must DEFINE it in simple language in order to use it2425Let’s make sense together•The pepper: what was relevant about the balloon analogy?•Remember, the pepper is an indicator (way to visualize). What’s the water doing?•Mix and match: If the detergent really has broken the surface tension of water… what? •Can you PREDICT the result of a staple-floating attempt?•The drops. Does ‘like attract like’? Just what does oil like?26TA-lead discussionOPTIONAL; Note that there are 20’ of assignment explanation & cleanup relevantIf it’s after ##:15 o’clock, you don’t have time for this27Evaporation•First things first--what is it? What’s going on in terms of molecules•Experiment: Ethanol and water on your arm: which is cooler & why?•Prediction: based on molecular weight, which should evaporate more quickly--H2O (2 x 1 + 1 x 16) or CH3CH2OH (5 x 1; 2 x 12; 1 x 16)•If not, why not?•Salt--ever tasted your sweat? Or anybody else’s for that matter?•What benefit might there be to adding NaCl to water that you are intending to evaporate?28Clean up!•Oil waste in the hood•anything too messy wadded up and discarded29Getting Control Center•Go to the homepage: http://blc.arizona.edu/courses/mcb184/switcher.html•Select MCB181L.30Getting Control Center•This will take you to the 181L homepage•Select Control Center.31Getting Control Center•That will take you to this page. Select Mac or Win for 181L•The information above provides detailed information