Examen
Solution Manual For Foundations of College Chemistry, 16th Edition by Morris Hein, Susan Arena, Cary Willard Chapter 1-20
Solution Manual For Foundations of College Chemistry, 16th Edition by Morris Hein, Susan Arena, Cary Willard Chapter 1-20
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13 novembre 2024
Nombre de pages
381
Écrit en
2024/2025
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Chemistry
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Solution Manual For
Foundations of College
Chemistry, 16th Edition
by Morris Hein, Susan
Arena, Cary Willard
Chapter 1-20
CHAPTERi 1
ANiINTRODUCTIONiTOiCHEMISTRY
SOLUTIONSiTOiREVIEWiQUESTIONS
1. (a)iAihypothesisiisiaitentativeiexplanationioficertainifactsitoiprovideiaibasisiforifurt
heriexperimentation.iAitheoryiisianiexplanationiofitheigeneraliprinciplesiofice
rtainiphenomenaiwithiconsiderableievidenceitoisupportiit.
(b) Aitheoryiisianiexplanationiofitheigeneraliprinciplesioficertainiphenomenaiwithic
onsiderableievidenceitoisupportiit.iAiscientificilawiisiaisimpleistatementiofinat
uraliphenomenaitoiwhichinoiexceptionsiareiknowniunderitheigiveniconditions.
2. (a) hypothesis
(b) hypothesis
(c) observation
(d) theory
(e) observation
(f) scientificilaw
3. (a) Ailiquidihasiaidefiniteivolumeibutinotiaidefiniteishape.
(b) Aigasihasianiindefiniteivolumeiandihighicompressibility.
(c) Aisolidihasiaidefiniteishape.
(d) Ailiquidihasianiindefiniteishapeiandislighticompressibility.
4. Aicrystallineisolidihasiairegular,irepeating,ithree-
dimensional,igeometricipattern.iAniamorphousisolididoesinot.
(a) Aisolidithatihasiairegular,irepeatingipatterniisiaicrystallineisolid.
1
, (b) Aiplasticisolidiisiamorphous.
(c) Aisolidithatihasinoiregularirepeatingipatterniisiamorphous.
(d) Glassiisianiamorphousisolid.
(e) Goldiisiaicrystallineisolid.
5. Aiphaseiisiaihomogeneousipartiofiaisystemiseparatedifromiotheripartsibyiaiphysicalib
oundary.
6. Thereiareisixiphasesipresent.
7. Anotherinameiforiaihomogeneousimixtureiisisolution.
8. Alcohol,imercury,iandiwateriareitheionlyiliquidsiinitheitableiwhichiareinotimixtures.i
Mercuryiisianielement;ialcoholiandiwateriareicompounds.
2
, –i Chapteri 1i –
9. Airiisitheionlyigasimixtureifoundiinitheitable.iTheiotherigasesiareielementsioric
ompounds.
10. Threeiphasesiareipresentiwithinitheibottle;isolidiandiliquidiareiobservedivisually,iw
hileigasiisidetectedibyitheiimmediateiodor.
11. Theisystemiisiheterogeneousiasithreeiphasesiareipresent.
12. Aisystemicontainingionlyioneisubstanceiisinotinecessarilyihomogeneous.iTwoip
hasesimayibeipresent.iExample:iiceiiniwater.
13. Aisystemicontainingitwoiorimoreisubstancesiisinotinecessarilyiheterogeneous.iIniais
olutionionlyioneiphaseiisipresent.iExamples:isugaridissolvediiniwater,idiluteisulfu
riciacid.
14. Homogeneousimixturesicontainionlyioneiphase,iwhileiheterogeneousimixturesi
containitwoiorimoreiphases.
15. (a)isugar,iaicompoundiandi(c)igold,ianielement
16. Usingitheistepsiofitheiscientificimethoditoihelpidetermineiwhyiyouricelliphoneihasist
oppediworking.
(a) Observation: Myicelliphoneihasistoppediworking.
(b) Hypothesis: Iithinkithatitheibatteryineedsitoibeirecharged.
(c) Experiment: Plugiinitheiphoneitoirechargeitheibatteryiandiallow
sufficientitimeiforitheibatteryitoifullyirecharge.iTurnitheipho
neibackion.iTheiphoneinowiworksiagain.
(d) Theory: Theibatteryiinitheiphoneihasiailimitedichargeitimeiand
needsitoibeirechargedioniairegularibasisiiniorderitoikeepiitiin
iworkingiorder.
3
, –i Chapteri 1i –
SOLUTIONSiTOi EXERCISES
1. Twoistatesiareipresent;isolidiandigas.
2. Twoistatesiareipresent;isolidiandiliquid.
3. Theiphotoirepresentsiaiheterogeneousimixture.
4. Theimapleileafirepresentsiaiheterogeneousimixture.
5. (a) homogeneous
(b) heterogeneous
(c) heterogeneous
(d) heterogeneous
6. (a) homogeneous
(b) homogeneous
(c) heterogeneous
(d) heterogeneous
7. Typicalianswersicouldibe
Substance MainioriActiveiIngredient
chocolateisyrup highifructoseicornisyrup
margarine vegetableioili blend
nondairyicreamer cornisyrupisolids
beefibouillon salt
toothpaste sodiumifluoride
antibacterialisoap triclocarban
firstiaidispray lidocaineiHCl
sunblockilotion ethylhexyli p-methoxycinnamate
8. Theistepsiofitheiscientificimethodicanibeiuseditoipredictitheioutcomeiofitheisemesteriin
itheifollowing iway:
(a) Collectitheifactsioridata.iTheyiincludeitheinumberioficlassesiyouihaveienr
ollediin,itheiamountiofitimeiyouiwilligiveitoieachiclass,itheinumberiofihours
irequirediforiyouriofficampusijob,ianditheiamountiofitimeiforisocialiactiviti
es.
(b) Formulateiaihypotheses.iYouipredictithatitheiamountiofitimeiyouihaveiallocat
edieachiweekiforiclassiworkiwillibeisufficientitoiresultiinigoodigradesiatitheiendi
ofitheisemester.
(c) Planiandidoiadditionaliexperimentsitoitestitheihypothesis.iInitheifirstitwoiw
eeksiofitheisemesterikeepiairecordiofiyouriperformanceiinieachiclass,iincl
udingigradesionihomework,iquizzes,iandiexams.
(d) Modifyitheihypothesis.iIfiyourigradesiinianyiclassiareinotigood,iyourihypot
hesisiwasiincorrect.iItiwillibeinecessaryitoiincreaseitheiamountiofitimeiallocat
editoithaticlass.
4