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CHEM 101 LAB FINAL EXAM QUESTIONS WITH CORRECT ANSWERS.

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CHEM 101 LAB FINAL EXAM QUESTIONS WITH CORRECT ANSWERS.

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CHEM 101 LAB FINAL EXAM QUESTIONS
ee ee ee ee ee




WITH CORRECT ANSWERS
ee ee ee




When eeshould eeyou eeNOT eewear eegloves eein eethe eelab eesetting?

a. When eeweighingBour eereagents eeat eethe eebalances

b. When eeentering eein eedata eeon eeyour eelaptop

c. When eehandling eeclean eeglassware

d. When eewriting eenotes eeon eescratch eepaper eeusing eea eepen eeand eepaper ee- eeCORRECT eeANSWER ee-b eeand
eed



*also eeshould eenot eewear eegloves eewhen eeopening eedoors



General eeglove eerules ee- eeCORRECT eeANSWER ee-- eeyou eeshould eenever eereuse eegloves

- dispose eeof eegloves eeif eethey eeare eeheavily eecontaminated

- dispose eeof eegloves eeif eethey eeare eetorn

- dispose eeof eegloves eein eethe eeglove eehazardous eewaste eecontainer

- gloves eemust eebe eeworn eeat eeall eetimes eewhile eehandling eechemicals eeor eeglassware

- do eenot eewear eegloves eeoutside eeof eelab



You eemake eea eesolution eeof ee0.1M eeNaOH eeand eeaccidentally eespill eethe eesolution, eecovering eeyour
eegloved eehan eed eeand eeonto eeyour eearm. eeYour eewrist eewas eeexposed, eeand eethe eesolution eecame eeinto


eedirect eecontact eewith eeyo eeur eeskin. eeWhat eeshould eeyou eedo? ee- eeCORRECT eeANSWER ee-


let eeyour eeTA eeknow eeand eewash eeyour eeskin eeunder eerunning eewater eefor eeat eeleast ee15 eeminutes



When eeshould eegoggles eebe eeworn eein eelab? ee- eeCORRECT eeANSWER ee-The eewhole eetime eeyou eeare eein eelab



You eeare eetaking eean eeevening eelaboratory eesession eeand eewant eeto eebring eea eesnackBto eehelp eeyou
eemake eeit eethou eegh eethe eeevening. eeWhen eeshould eeyou eebe eeallowed eeto eehave eefood eeat eethe


eebench eetop eein eethe eelab?



a. If eethe eeexperimental eeworkBis eeover eeand eecleaned eeup

, b. At eethe eebeginning eebecause eeit eeis eedinner eetime eeand eebeing eea eestudent eeis eeexhausting.

c. Only eeif eethe eefood eeremains eein eethe eestudents eebackpack eewhile eeat eethe eebench eetop.

d. Never.

e. Never, eeunless eeyou eehave eea eetendency eeto eebecome eehypoglycemic, eethen eeyou eeare eeallowed eeto
eeeat eeat eet eehe eebench eeto eepreventBhealth eeissues. ee- eeCORRECT eeANSWER ee-d. eeNever




Accuracy ee- eeCORRECT eeANSWER ee-
A eemeasure eeof eehow eeclose eea eemeasurement eeis eeto eethe eetrue eevalue eeof eethe eequantity eemeasured.



Precision ee- eeCORRECT eeANSWER ee-
A eemeasure eeof eehow eeclose eea eeseries eeof eemeasurements eeare eeto eeone eeanother.



Systematic eeerror eearises eefrom eea eeflaw eein eethe eeequipment eeor eein eethe eeexperimental eedesign.
eeThis eetype eeof eeerror eecan eebe eedetected eeand eecorrected. eeIt eeleads eeto eepredictable eeresults.


eeProvide eeseveral eeexamples. ee- eeCORRECT eeANSWER ee--


a eescale eethat eeis eeimproperly eecalibrated eeand eealways eereads ee2.3 eegrams eeheavier eethan eethe
eeobject eeactuall eey eeis



- a eestretched eeout eemeasuring eetape eethat eealways eereads eevalues eelower eethan eethe eetrue eevalue.



Random eeerror eearises eefrom eeuncontrolled, eeoften eeuncontrollable, eevariables eein eean eeexperiment
eewhich eehas eeequal eechance eeof eebeing eepositive eeand eenegative. eeThis eetype eeof eeerror eecannot eebe


eedetected eeor eecorrec eeted eefor. eeIt eeleads eeto eeunpredictable eeresults. eeResults eewill eelikely eecluster


eearound eetrue eevalue. eeProvide eesev eeeral eeexamples. ee- eeCORRECT eeANSWER ee--


wind eespeed eemight eespeed eeup eeor eeslow eedown eeat eeunpredictable eetimes

-
any eemeasurement eebetween ee2 eemarkings eebecause eedifferent eepeople eewill eeread eethe
eemeasurement eedif eeferently




EXP ee1: eeWhy eedoes eeice eefloat eein eewater? ee- eeCORRECT eeANSWER ee-
Ice eeis eeless eedense eethan eewater eebecause eethe eenegatively eecharged eeoxygen eeatoms eerepel eeone
eeanother eedu eee eeto eeHydrogen eebonding. eeAfter ee4 eeC ee(40 eeF), eewater eebegins eelosing eedensity.

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