IPrinciplesofChemistry-2015 MidtermExam-Topics
Thereare48MultipleChoiceQuestions.Thereare5mandatoryopen-endedand2whichyouwillselectoutof4.
Unit1A
Density-defineitandcalculateit;Mixtures-heterogeneousmixtures,homogeneousmixtures,suspensions,colloids, solute,solvent,solution;atoms,elements,diatomicelements,compounds;drawmoleculemodels;polarityofwater;ioniccharges,anions,cations,periodictable,lawofconservationofmass,
Unit18/C
conversiontable,physicalandchemicalproperties,qualitativeandquantitativeProperties,Bohr,Thomson, Saturated,unsaturatedandsupersaturatedsolutions;solubilitycurves(temperature vs.solubility);Heavymetals;pHscaleacidandbases;Solvents;relationshipbetweendissolvedoxygenandwatertemperature,
Vocabulary List:"/u
SolidS\ctr'f\'1r\rJ.dSh-'1)V o/uk.
•Liqui_d"'"w,auc,r -sn.,f-,f;lw:<vuIvoJS.-rLvw.till-i=iv'J·
gases'\.\I.Jw\-t='rl\'\)")h\::\Nt'L*'nfrJ ll.a. )t-VCJr\J' 1
evaporation '..'\"''."\'\DMLi9"'c<pD00!1!fYJQ.\&-
solutionQ..\fC)Gf)uCuf)unt'Cf1Ut-fur110.vIrD•
-sandfiltration
-filtrate
-soute
-- solvent
supersaturatedprecipitate
ionIcation/anion
meniscusdistillationTyndallEffect
Qualitative/quantitative
Reactants/products
-Atoms
Scientist (atoms)
-#ofprotons/electronsandneutrons
IoniccompoundMolecularcompoundMasspercentage
ChemistryMid-TermExam2015ReviewPacket
Name:'S)\\\-e ,Q'{'(\\\.e_V\--0\.lv
'
Period:\el
1.Whenmeasuringthevolwneofwaterinagraduatedcylinder,itisimportanttoreadthevolwneproperlyusingthemeniscus.Whatisthemeniscusandhowshoulditberead?
\'1--e...n""/bound+n.,-th
b"V\k>.jb.coviJ:Lof-
k
\LJZ
'-.Q.L
<4?c..(4_
Usethefollowingtoanswerquestion:
Matchthetermwiththebestdefinition.A)waterfromawell
B)porousrockthatcontainswater
C)Occurswhenfogforms
D)occurswhenthesunshinesonwetsurfaces
E)smallestunitofanelement
F)Suspensions,colloids,andsolutionsaretypesof
G)Negativelychargedfundamentalparticlesofanatomarecalled
H)Thenamegiventoapositiveion
I)Thenamegiventoaanegativeion
6. Anion
"\:-7. Mixtures
G8. Condensation
PrinChem_MT_Review_OS-09Page1
9. Electrons
I0.Evaporation
,.-
11. Cation
12. Atom
Q]13. Giventhebalancedequation:Mg+02MgO
Thereactantsintheequationare
\j:_14.Whichofthefollowingisadiatomicmolecule?
(\A)NaClB)02C) noneoftheabove
t1-15J{olutionsare
omogeneous B) heterogeneousC)odorless
symboldoesnotrepresentanion?
B)ca+C)CI-
I7.Whichpairformsaheterogeneousmixtur
.A)coffeeandwaterB) sugarandwatelandvinegar
VI_Iatomlosesanelectron,itbecomesa
orepositiveB) morenegativeC)neutral
00.()"
c'V\Q()<- o
19. Whatisthechargeofanionhaving6protonsand3electronsformedfromasingleatom?
A)2·B) 3+C) 4·\
•Usethefollowingtoanswerquestions20-21(__)
Identifythemixturewiththegivendefinition.A)solution
B)suspension
-20. Saltwater
1.Italiansaladdressing
·_22. Whatistherelationshipbetweenthetemperatureofriverwaterandheconcentrationofdissolveoxygen?
vf'\W
1\)
Usethefollowingtoanswerquestions22-23:
200
190J
181)I
. t170I
\u'--\\'Y·-=\\
:-\t'E"l-12
...160
lSO
Ill) 140
.tfkl'_..,'--
(j,.\.)1"\_
(ji-
130
.5120l
"2110f
>too
·.0I
.lO'I
80
70I
1"\\"'S.pJilt
60
a"' 40
I)30v
20/
10
'/:
/\C;C.\I-
NaCI
0o20406080100
Temperature(0C}
22. WhatisthemassofKNOJneededtomakeasaturatedsolutionin100gramsofwateraf20°C?
'?£)-'3\..-
_23. 80gofKClat20°Cisa(n)
A)unsaturatedsolutionB) saturatedsolutiopersaturatedsolution_
_24. Definesolute,solutionandsolvent\
So"-\-%..\.Jt1'.s.su)\.z)){lJ\utl9r Sv£
Sv\\Jk/\-1-..--n.a_.ct'->c;lSv01-<...L.d.)s \J\0
Su'v-1-\W\'.toN)\?)('\"")-\)VnD-\s\Jk}Q.../SOh.i/.tT\)r
25.Whensubstancesreactthesolidthatsettlestothebottomofthecontainerasasolid iscalleda
-C\X:Q:G\0 C
\G\
,,'Jt-S-1\
llle_Irelrtoc:liG--Jclassifieselementsaccordingto:
A)atomicnumbers . B) atomicmassesC) boilingpoints
_27.atisthetotalnumberofneutronsinanatomwithamassnumberof20andan tomicn . br
->I\>\QlO.-.- 'C" kl;---;-:tt-;-
1\\J-{\\GP·..
\)r-e,\---=--+-...... ;-r---t--U::.....-+-:t_j
Jf(p
_28. List3differencesbetweenphysicalandchemicalproperties
oil+'115.
_29. Whatpropertiesdometalloidshavethatmakethemunique?
30.Chlorinbelongstothe \.l...: C\..--l\.....li R4 (\-family.
31. Completethefollowingtableofioniccompounds.
ChemicalFormulaChemicalName
CaO
NaCl
LhS
bariumfluoridealuminumcarbonate
_32. Completethefollowingtablebynamingtheelementspresentandthenumberofeachtypeofatom.MakesuretorefertoyourPeriodicTableofElements.
ompound
_33.Decidewhethereachofthefollowingatomsareelectricallyneutral.
NOct\v:x.--1-\u
\l')-...c:Gx\r\.q\v
34.Drakefounda"gold"coinonthesidewalk.Hedecidedtofigureoutitsdensitytodeterminewhetherornotthecoinisrealgold.Themassofthecoinis3.3gandhasavolumeof1 latethe
density..j
D= Mass
Volume
U-=-\.<;-rn
\"r'\CtS.3'1<]
\[o\::-\'S\'f\\_
35.
Mass%=Massofcompoundx100
MassoftotalCompound
-&:>'\,,-
a. Calculatethepercentbymasspercentageof SOgFluorinein250gof CaF2?
-::'6-x\ f)O:::o,O-
.SDd
b. Whatisthemas;p'Fluorinein350gofCaF2
N\<;<'I·) -
f.\DU... \-}-q
t_,·""
36. DrawamodelofasupersaturatedsolutionofNaCl inwater(H20).
-1\\0e..soLv+c. J'
r:
®®®
(1\
®
Y\UW
('(\U('
--I"M"\\l,D
38.
0
.00
0(J()0
\tovv
O.mf=bS- mL
(:,:'>\=<-(!,_-\-o-\-kf-i;Y'\-\->)
75mm=
S'nm
(_l_p'>\D(l1Sv)\)
8.70hm=•<?]km
IOcm=
,.---=---1-m
5g=(.)\)\)tJ\)1) 01Jt00g
o.o76hm=1\oDDO00,Jlm
\
39.l\'<\\c_(1J).
WhichofthefollowingwouldNOTbepartoftheScilotific Method
a. observations
. b.hypothesis
c.experimentation
blishinginaccurateresults.
·'l>
•-J
40.
Ahypothesisincludeswhichofthefollowing?
a.measuringb.observing
entativeexplanationd.collectingdata
41.
-eoryincludeswhichofthefollowing?
Uftperimentalevidencetosupportresultsb.aneducatedguesstopredictresults
c.theobservationofaphysicalcharacteristicd.ameasurementofaphysicalproperty
42.Whatisaccuracyandprecision?
\q\\Y'l'\1\C'n0-vvS.
43.Lewisdotstructure.
.))\)''Ns,v,)V"'--"\r)U('"'("\V,l)'?
LewisDotstructurefor
K
44.@.
Thomsonge
tl]
.
I
\Rutherford
LChadwick
\--\tJ\J
\-ea_c,....s
)Aristotle,...... .
Democritos
Isotopes:Whatisanisotope?
s:f'\·CT-Lf\\Dffi\(_
vt6'\({P-"'1
(_flp<MJ\i)
Tf-rRt\k'Vv(\H)n.s-
WhatisthemassnumberandAtomicNumber
c-R)(?
Element
\]0\ll... f(\(YIDSt'tff)J;q+lt'l
A"AI,). ('r',,t