CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 1%

1.%%At%a%particular%temperature,%Kc%=%2.5%x%1010%for%the%reaction%%2SO2(g)%+%O2(g)% %%2SO3(g)%%

%What%is%Kc%for%the%reaction%SO3(g)% %%SO2(g)%+%½%O2(g)%%% A)%4.0%x%10J11%% B)%1.6%%x%10J21%% C)%6.3%x%10J6%% D%6.3%x%1020%%% E)1.6%x%105%%%2.%%The%value%of%K%at%308%K%is%6.5x104%for%the%reaction%of%NO(g)%with%chlorine%gas%to%form%NOCl(g).%%If%PNO%=%%0.35%bar%and%PNOCl%%=%0.10%bar%at%equilibrium,%then%what%is%the%equilibrium%partial%pressure%of%the%chlorine%gas?%%% A)%2.3%x%105%% B)%4.3%x%10J6%% C)%1.9%x%103%% D)%5.4%x%10J4%% E)%1.3%x%10J6%%%3%%Which%statement%is%true?%%% A)%All%reaction%quotients%are%equilibrium%constants.%% B)%If%K%>%Q,%then%the%reaction%must%shift%to%the%reactants%(left)%to%reJattain%% %% %%%%%%equilibrium.%% C)%If%Q%<%K,%then%the%reaction%is%nonspontaneous.%% D)%Not%all%equilibrium%constants%are%reaction%quotients.%% E)%If%Q%>%K,%the%reaction%must%proceed%in%a%direction%to%reduce%the%amount%of%% %% %%%%%%products%present%or%increase%the%amount%of%reactants.%%%4.%%Which%species%is%least%likely%to%be%completely%deprotonated%in%aqueous%solution?%%% A)%HNO3%% B)%%HF%% C)%HCl%% D)%HBr%% E)%HClO4%%%%%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 2%

5.%%What%is%the%expression%for%the%reaction%quotient%for%the%reaction:%%

%4NO2(g)%+%O2(g)% %2N2O5(s)%%

% A)%%%

€

Q =(PN2O5 )

2

(PNO2 )4 (PO2 )

%%

%

% B)%

€

Q =(PN2O5 )

(PNO2 )4 (PO2 )

%

%% C)%

€

Q = (PNO2 )4 (PO2 ) %

%

% D)%

€

Q =1

(PN2O5 )2 %

%

% E)%

€

Q =1

(PNO2 )4 (PO2 )

%

%%6.%%Which%statement%is%true?%%% A)%NH3%is%a%BronstedJLowry%base%because%it%is%a%proton%donor.%% B)%The%bromide%ion%is%a%Lewis%base,%but%not%a%BronstedJLowry%base.%% C)%Water%can%be%a%BronstedJLowry%acid%AND%a%Lewis%base,%depending%on%% conditions.%% D)%Metal%cations%tend%to%be%Lewis%acids%due%to%their%ability%to%donate%electron%%%% %%%%%%pairs.%% E)%HSO4J%is%neither%an%acid%nor%a%base%under%any%theory.%%%%7.%%At%425oC,%K%=%4.18%x%10J9%for%the%reaction%2HBr(g)% %H2(g)%+%Br2(g).%%If%0.20%bar%of%HBr(g),%and%0.010%bar%of%both%H2(g)%and%Br2(g)%are%introduced%into%a%container,%then%which%expression%best%represents%the%equilibrium%pressure%of%HBr?%%% A)%0.20%–%x%% B)%0.20%–%2x%% C)%0.20%+%x%% D)%0.20%+%2x%% E)%0.010%+%x%

%%%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 3%

%8.%%What%is%the%conjugate%base%of%HPO42J%?%%% A)%PO43J%% B)%H3PO4%% C)%H2PO4J% %% D)%HPO4%% E)%H2PO4%%%%9.%%What%is%the%pH%of%a%0.0147%M%solution%of%KOH%at%room%temperature?%%% A)%1.83%% B)%12.17%% C)%13.98%% D)%12.47%% E)%1.53%%%%10.%Which%base%is%weakest?... A)%BrO4J%% B)%BrO3J%

C)%IO4J%D)%BrOJ%E)%IOJ%

%%12.%%Which%statement%regarding%a%solution%of%0.0100%M%NaNO2%is%true?%%% A)%The%pH%of%the%solution%is%acid%because%HNO2%is%a%weak%acid%that%% %% %%%% %%%%%%undergoes%acid%hydrolysis%to%produce%H3O+%in%solution.%% B)%The%pH%of%the%solution%is%neutral%because%it%was%made%from%a%strong%base% %% %%%%%and%a%weak%acid.%% C)%The%pH%of%the%solution%is%basic%because%NaOH%is%a%strong%base%that%% %% %%% %%%%%undergoes%base%hydrolysis%to%produce%OHJ%in%solution.%% D)%The%pH%of%the%solution%is%acidic%because%the%conjugate%acid%of%NaOH%%%% %%%%%% undergoes%acid%hydrolysis%to%produce%H3O+%in%solution.%% E)%The%pH%of%the%solution%is%basic%because%the%conjugate%base%of%HNO2%% % %% %%%%%%undergoes%base%hydrolysis%to%produce%OHJ%in%solution.%%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 4%

13.% 100%mL%of%each%of%the%following%solutions%is%mixed.%%Which%one%of%the%mixed%solutions%is%a%buffer?%%A)% 1.0%M%CH3NH2(aq)%+%0.6%M%KOH(aq)%%B)% 1.0%M%CH3NH3Cl(aq)%+%1.0%M%KOH(aq)%%C)% 1.0%M%CH3NH2(%(aq)%+%0.8%M%HNO3(aq)%%D)% 1.0%M%NH4Cl(aq)%+%0.8%M%HCl(aq)%%E)% 2.0%M%CH3NH2(%(aq)%+%2.2%M%HNO3aq)%%

%%%14.%%A%100.0%mL%sample%of%0.0200%M%propanoic%acid%(monoprotic,%Ka%=%1.3%x%10J5)%is%titrated%with%0.100%M%NaOH.%%What%is%the%pH%of%the%system%once%1.00%mL%of%NaOH%have%been%added?%%% A)%1.70%% B)%3.61%% C)%7.00%% D)%4.89%% E)%10.7%%%%

15.% Which%statement%regarding%the%reaction%of%HCN%with%NH3%is%true?%%A)%NH3%is%the%proton%donor.%B)%The%N%of%HCN%is%the%electron%pair%donor.%C)%A%coordinate%covalent%bond%is%broken.%D)%A%coordinate%covalent%bond%is%formed.%E)%None%of%these%statements%is%true.%%

%%16.%%What%concentration%of%HNO2%is%required%to%produce%a%solution%whose%pH%is%1.26?%%The%Ka%for%HNO2%is%7.2%x%10J4%%% A)%4.25%M%% B)%9.75%M%% C)%1.16%M%% D)%0.055%M%% E)%3.96%M.%%%%%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 5%

17.%%Identify%the%most%likely%analyte%and%titrant%(listed%in%that%order)%based%on%the%curve%below.%!

%% % % %

%% A)%NaOH,%HCl% % % % %% B)%HBr,%LiOH% % % % % %%% C)%H2SO4,%KOH%% D)%Ba(OH)2,%HNO3%% E)%CH3COOH,%NaOH%%%%18.%%What%is%the%pH%of%a%buffer%composed%of%0.50%M%CH3COOH%and%0.50%M%NaCH3COO%after%0.020%mol%of%HCl%has%been%added%to%1.0%L%of%the%buffer%solution?%%Assume%no%change%in%volume.%%The%Ka%of%CH3COOH%is%1.8%x%10J5%and%the%Kb%of%NaOH%is%108.%%% A)%3.56%% B)%4.71%% C)%4.74%% D)%6.44%% E)%4.78%%!19.%%What%is%the%oxidation%state%for%Mn%in%Ca(MnO4)2?%%% A)%+8%% B)%+7%% C)%+6%% D)%+2%% E)%0%%%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 6%

%20.%%The%molar%solubility%of%PbI2%in%water%at%25oC%is%0.0015.%%What%is%the%Ksp%for%PbI2%at%that%temperature?%%% A)%3.6%x%10J8%% B)%3.4%x%10J9%% C)%6.8%x%10J9%% D)1.4%x%10J8%% E)0.29%%%%21.%What%effect%(and%why)%does%the%addition%of%Na2CO3%have%on%the%solubility%of%ZnCO3?%% %% A)%The%solubility%increases%due%to%complex%ion%formation.%% B)%The%solubility%decreases%due%to%complex%ion%formation.%% C)%The%solubility%decreases%due%to%the%common%ion%effect.%% D)%The%solubility%increases%due%to%the%common%ion%effect.%% E)%The%solubility%increases%as%a%result%of%both%the%common%ion%effect%and%% %% %%%%%complex%ion%formation.%%%%%Use%the%unbalanced%oxidationJreduction%reaction%to%answer%questions%22J23.%%

Cr2O72J(aq)%+%Zn(s)%%%Zn2+(aq)%+%Cr3+(aq)%%22.%%What%is%the%oxidizing%agent?%%% A)%Zn(s)%% B)%Cr2O72J(aq)%% C)%Zn2+(aq)%% D)%Cr3+(aq)%% E)%There%is%no%reducing%agent.%%%23.%%What%is%the%sum%of%the%coefficients%when%the%reaction%is%balanced%in%acid?%%% A)%4%% B)%5%% C)%18%% D)%30%% E)%64%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 7%

%24.%%Which%answer%option%correlates%the%values%of%Gibbs%free%energy,%cell%potential,%and%the%equilibrium%constant%for%a%galvanic%cell?%% % %% % Gibbs!free!energy! ! K! ! Eocell!% A)%%%%% % +% % % >%1%% %%%%%%%%%%%%%%%%J%% B)%% % +% % % <%1% % %%+%

% C)%% % J% % % >%1% % %%+%

% D)%% % J% % % <%1% % %%+%% E)%% % J% % % >1% % %%J%%%%25.%%Calculate%the%value%of%the%equilibrium%constant%(T%=%298%K)%%% Pb(s)%+%2Ag+(aq)%%%Pb2+(aq)%+%Ag(s)% Eocell%=%+0.93%V%%% A)%J1.8%x%105%% B)%1.3%x%1031%% C)%7.7%%x%1030%% D)%1.5%x%1031%% E)%2.9%x%1031%%%26.%%Which%statement%regarding%the%galvanic%cell%represented%by%the%line%notation%below%is%true?%

Pt!H2(g)!H+(aq)%|| Cl−(aq)!AgCl(s)!Ag(s)%%

% A)%Anions%must%flow%into%the%anode%to%maintain%charge%balance.%% B)%Platinum%is%an%inert%electrode%in%both%halfJcells.%% C)%Solid%silver%metal%is%produced%at%the%anode.%% D)%Electrons%flow%from%the%cathode%to%the%anode.%% E)%The%standard%hydrogen%electrode%(SHE)%is%the%cathode%%%27.%The%rate%constant%for%the%decomposition%of%cyclobutane%(C4H8)%at%1000oC%is%%87%M01sJ1.%%If%the%initial%concentration%of%cyclobutane%is%2.00%M,%what%percent%of%it%decomposes%in%0.010%seconds?%%% A)%8.0%%% B)%64%%% C)%42%%% D)%36.%%% E)%20.%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 8%

%%%28.%%Determine%the%rate%law%from%the%data%given.%

Experiment! Initial![NO]! Initial![O2]! Initial!rate!(M/s)!1% 0.0110% 0.0130% 0.00321%2% 0.0220% 0.0130% 0.00640%3% 0.0110% 0.0260% 0.0128%4% 0.0330% 0.0130% 0.00960%5% 0.0110% 0.0360% 0.0288%

%% A)%rate%=%k[O2][NO]%% B)%rate%=%k[O2]2[NO]%% C)%rate%=%k[O2]%% D)%rate%=%k[O2][NO]2%% E)%rate%=%k[NO]%%%29.%%%A%galvanic%cell%was%constructed%using%the%Zn2+/Zn%and%H2/H+%(standard%hydrogen%electrode)%halfJcells%under%the%following%conditions.%%What%is%Ecell%%at%%298%K%?%%% Zn2+(aq)%+%2eJ%%%Zn(s)% % Eo%=%J0.76%V%% 2H+%+%2eJ%%%H2% % % Eo%=%0.00%V%% [Zn2+]%=%0.010%M%% [H+]%=%2.5%M%% PH2%=%0.30%atm%%% A)%0.86%V%% B)%0.76%V%% C)%0.53%V%% D)%0.31%V%% E)%1.21%%%30.%How%many%hours%are%required%to%plate%25.00%g%of%nickel%metal%from%1.00%M%NiSO4(aq),%using%a%current%of%3.00%C/s?%%% A)%7.6%h% %% B)%3.8%h%% C)%8.3%h%% D)%2.6%h%% E)%255%h%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 9%

31.%%If%the%rate%constant%for%a%given%reaction%is%33%MJ1sJ1%at%298%K%and%45%MJ1sJ1%at%675%K,%then%what%is%the%activation%energy%for%the%reaction?%%% A)%1.4%kJ/mol%% B)%140%kJ/mol%% C)%J1.4%kJ/mol%% D)%3.9%kJ/mol%% E)%There%is%not%enough%information%to%determine%the%activation%energy.%%32.%%A%main%group%element%should%always%have:%

% %% A)%partially%filled%d%orbitals.%% B)%its%last%valence%electron%filling%an%s%or%p%orbital.%% C)%properties%of%a%nonJmetal.%% D)%a%large%ionization%energy.%% E)%a%large%electronegativity.%%

33.%%Which%structure%is%a%feasible%transition%state%for%the%single%step%(elementary)%reaction%O%+%H2O%%%2OH%?%

%% A)%%

% %%% B)%

% %%% %%% C)%%

% % %% %% D)%

% %%% E)%

% %

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 10%

34.%%What%characteristic%is%most%influential%in%characterizing%a%hydride%as%saline%or%metallic?%

%% A)%electron%affinity%% B)%ionization%energy%% C)%atomic%radius%% D)%electronegativity%% E)%ionic%radius%

%%35.%%Elements%of%which%group%are%likely%to%form%3Jcenter,%2Jelectron%bonds?%%% %% A)%Group%I%% B)%Group%II%% C)%Group%III%% D)%Group%V%% F)%Group%VI%%%Use%the%following%mechanism%to%answer%questions%36%and%37.%% 1)%ClOJ%(aq)%+%H2O(l)% %HClO(aq)%+%OHJ(aq)% % (fast)%% 2)%IJ(aq)%+%HClO(aq)% %HIO(aq)%+%ClJ(aq)% % % (slow)%% 3)%OHJ(aq)%+%HIO(aq)% %H2O(l)%+%IOJ(aq)% % % (fast)%%36.%%Identify%the%intermediates.%%% A)%ClOJ,%HIO,%H2O%% B)%HClO,%H2O%,OHJ,%HIO%% C)%ClOJ,%IJ,%IOJ,%ClJ%% D)%IJ,%IOJ%% E)%HClO,%OHJ,%HIO%%%%%%%%%%%%%%%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 11%

37.%%Which%reaction%progress%diagram%most%accurately%portrays%the%mechanism?%%A)% % % % % % % D)%

% %%%%%%%%%%%%%%%%% %B)%%%%

%%%%%%%%%%%%% % % E)%None%of%these%C)%%%%%%%%%

%%%%%%%%%%%%% %%%%38.%%How%do%alkali%and%alkaline%earth%metals%(except%Be)%react%in%water?%%Assume%that%each%answer%option%lists%all%products.%%% A)%They%produce%hydrogen%gas%and%hydroxide%ions.%% B)%They%produce%water%and%hydroxide%ions.%% C)%They%produce%protons%and%water.%% D)%They%produce%Lewis%acids%(metal%cations)%hydroxide%ions.%% E)%They%do%not%react%with%water.%%%%%%%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 12%

39.%%Which%are%logical%products%for%the%reaction%of%4LiH%+%%AlCl3?%%% A)%3LiCl%+%LiAlH4%% B)%LiAlH4%+%LiCl%% C)%3LiClH%+%AlH%% D)%LiHCl%+%AlCl3%% E)%They%do%not%react.%%%40.%%Which%statement%about%the%coordination%complex%below%is%true.%

%

%

%

% A)%The%oxidation%state%for%the%Co%is%0.%% B)%The%coordination%number%for%the%complex%is%four.%% C)%The%complex%is%chiral.%% D)%The%complex%has%a%geometric%isomer.%% E)%The%complex%rotates%the%plane%of%polarized%light.%%%

41.%%Which%statement%regarding%[Fe(OH)6]4J%is%true?%

% A)%It%is%diamagnetic.%% B)%Its%electron%configuration%is%t2g6.%% C)%If%the%ligands%were%replaced%with%NH3,%the%configuration%would%be%t2g4eg2.%% D)%Both%B%and%C%are%true.%% E)%It%is%highJspin.%%%42.%%The%coordination%complexes%below%exhibit%what%type%of%isomerism?%%

[CrCl(NH3)5]Br%and%[CrBr(NH3)5]Cl%%

% A)%coordination%% B)%linkage%% C)%ionization%% D)%hydration%% E)%geostereoisomerism%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 13%

43.%%What%happens%to%the%5%degenerate%d%orbitals%when%the%nickel(II)%cation%forms%the%complex%[Ni(NH3)6]2+?%%% A)%The%orbitals%spit%so%that%there%are%three%d%orbitals%with%higher%energy%than%%%% %%%%%%the%other%two.%% B)%The%orbitals%split%so%that%there%are%two%%orbitals%with%higher%energy%than%% %% %%%%%%the%other%three.%% C)%The%five%orbitals%remain%degenerate%but%have%a%higher%energy%than%before%% %% %%%%%complex%formation.%% D)%The%five%orbitals%remain%degenerate%but%have%a%lower%energy%than%before%% %% %%%%%%complex%formation.%% E)%None%of%the%above.%%%%44.%%What%is%the%coordination%number%for%Pd%in%the%complex%[Pd(en)2)]Cl2?%%

% %%%%%%%%%%%%%%%% %%%%%%%%%%%en%

%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % %%%%%%%%%%%%%%%%%%%% A)%1%% B)%2% % %% C)%4%% D)%6%% E)%8%%46.%%Which%ion%is%least%likely%to%exist?%%% A)%V3+%% B)%Mn7+%% C)%Co9+%% D)%Cu2+%% E)%Cr6%%47.%%How%many%unpaired%electrons%would%you%expect%for%the%central%metal%to%have%in%the%complex%[Fe(CN)6]4J%?%%% A)%4%% B)%5%% C)%2%% D)%1%% E)%0%%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 14%

48.%%Which%oxides%are%(or%can%be)%basic?%% %% % I.%%%Na2O%% % II.%%SO3%% % III.%Al2O3%% % IV.%P2O5%%% A)%I%and%III%% B)%I%only%% C)%II%and%IV%% D)%II%and%III%% E)%II,%III,%and%IV%%%49.%%Which%statement%is%false?%% %% A)%Co%has%a%greater%atomic%radius%than%Rh.%% B)%Cr6+%has%a%smaller%ionic%radius%than%Cr3+%

% C)%Co2+%has%a%smaller%atomic%radius%than%Fe2+.%% D)%Zn%has%a%smaller%atomic%radius%than%Ni.%% E)%Ru%and%Os%have%almost%the%same%atomic%radii.%

%%50.%%Which%statement%regarding%the%noble%gases%is%false?%% %% A)%All%members%of%the%group%have%complete%octets.%% B)%All%members%of%the%group%occur%in%the%atmosphere%are%monatomic%gases.%% C)%Fluorine%is%the%most%electronegative%of%the%noble%gases.%% D)%There%are%no%known%compounds%containing%noble%gases.%% E)%None%of%these%statements%are%false.%%%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 15%

51.%%Which%of%these%molecules%is%chiral?%%%%%%%%%%%%%%%%I.%%%%%%%%%%%%%%%%%%%%%%%%II.%%

%%%%%%%%%III.%%

%%%

%% A)%I%only%% B)%II%only%% C)%III%only%% D)%I%and%II%% E)%II%and%III%%%%%%%

CHEM%1212K% Final%Exam% Summer%2011%

Form%A% 16%

52.%%Doping%germanium%with%which%element%results%an%nJtype%semiconductor?%%% A)%arsenic%% B)%gallium%% C)%carbon%% D)%tin%% E)%oxygen%!

53.%%Which%statement%regarding%molecular%orbital%theory%is%false?%%% A)%Constructive%interference%leads%to%a%bonding%molecular%orbital%that%is%% always%lower%in%energy%than%the%constituent%atomic%orbitals.%% B)%Destructive%interference%leads%to%an%antibonding%molecular%orbital%that%is%% always%higher%in%energy%than%the%constituent%atomic%orbitals.%% C)%A%linear%combination%of%N%atomic%orbitals%results%in%N%molecular%orbitals.%% D)%Degenerate%molecular%orbitals%have%different%energies.%% E)%Molecular%orbitals%are%filled%according%to%the%Aufbau%principle%to%give%the%% molecular%electronic%configuration.%%%54.%%For%molecular%orbital%theory%regarding%bulk%solids,%which%of%the%following%statements%is%true?%%% A)%The%molecular%orbitals%are%close%enough%in%energy%that%a%band%forms%% rather%than%discrete%orbitals.%% B)%The%distance%between%the%bands%is%called%the%energy%gap.%% C)%The%lower%energy%band%is%called%the%conduction%band.%%% D)%A%small%band%gap%results%in%a%material%being%an%insulator.%% E)%Conductors%do%not%have%a%valence%band.%!

55.%%Which%of%the%following%theories%of%bonding%best%explains%conductivity%in%metals?%%A) Molecular%orbital%theory%B) Valence%bond%theory%C) VSEPR%D) Electronegativity%E) Band%gap%theory%%