Chemistry 112 Name Final Exam Form A Section April 30,
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1 Chemisry Name Final Exam Form A Secion April 30, 0 IMPORTANT: On he scanron (answer shee), you MUST clearly fill your name, your suden number, secion number, andes form (whie cover = es form A; yellow cover = es form B). Use a # pencil. There are 40 quesions on his exam. Check ha you have done all of he problems and filled in he firs 40 bubbles on he scanron. Your score will be repored in percen (max 00%). Exam policy Calculaors wih ex-programmable memory are no allowed. Relevan daa and formulas, including he periodic able, are aached a he end of his exam. Your grade will be based only on wha is on he scanron form. The answer key will be posed on he web afer he exam (on he Exam Schedule page). You mus urn in your cover shee wih your scanron answer form. Hins As you read he quesion, underline or circle key words o highligh hem for yourself. Avoid errors from "mis-reading" he quesion. Pay aenion o unis and magniudes (decimal places) of numbers obained from calculaions. There is no penaly for guessing.
2 CHEMISTRY FINAL EXAM April 30, 0 FORM A. The elecron configuraion for Ti + is: A. [Ar] 4s B. [Ar] 3d C. [Ar] 3d 4s D. [Ar] E. [Kr] 4s. A caalys can speed up a chemical reacion by: A. lowering he energy of he producs B. increasing he energy of he reacans C. lowering he acivaion energy barrier beween reacans and producs D. being consumed in he overall reacion E. boh A and B 3. Which of he following elemens does no exhibi a posiive oxidaion sae? A. Li B. Cs C. F D. I E. O 4. The inermolecular forces holding ogeher he solid poly(vinylchloride), (CH CHCl) n are: A. London dispersion forces B. Dipole-dipole ineracions C. H-bonding D. Ion-ion ineracions E. Boh A and B 5. A biomaerial inended for long-erm replacemen of a bone mus A. be chemically iner. B. have sufficien rigidiy. C. no degrade over ime. D. no cause an immune response. E. possess all of he above properies. 6. An example of a bidenae ligand is: A. CH 4 B. CO C. EDTA D. ehylenediamine (H NCH CH NH ) E. NH 3 7. Naural rubber is oo sof and reacive for pracical applicaions. Vulcanizaion of naural rubber enails, A. conversion of an addiion polymer o a condensaion polymer. B. conversion of an condensaion polymer o an addiion polymer. C. crosslinking polymer chains wih sulfur aoms. D. increasing he molecular weigh of a condensaion polymer. E. decreasing he molecular weigh of an addiion polymer. 8. Which of he following combinaions can make a buffer? A. HNO 3 + NaNO 3 B. KCl + HCl C. NaNO + NaBr D. HF + KF E. NaOH + NaCl
3 9. For he daa shown below, which one of he following saemens is rue abou he reacion order? [A] [B] Iniial Rae (M/sec) A. The reacion is firs order in A and firs order in B. B. The reacion is firs order in A and second order in B. C. The reacion is zero order in A and firs order in B. D. The reacion is zero order in A and second order in B. E. The reacion is second order in A and second order in B. 0. A reacion ha is firs order in reacan X has a rae consan of 4.5 min -. Wha period of ime is required for he concenraion of X o change from 0.40 M o 0.05 M? A. 9.4 min B.. min C. 6.5 min D min E min. Wha is he nuclear binding energy for a single 4 N nucleus (mass of 4 N nucleus is amu)? A..6 x 0 J B..99 x 0 9 J C x 0 7 J D x 0 5 J E x 0 3 J. Which of he following reacions would lead o a ne decrease in he enropy of he sysem A.,, 3, and 4 B., 3, and 4 C.,, and 3 D., 3, 4 E. and 4. CH4 (g) + Cl (g) CH4Cl (g). n CH4 (g) (-CH-CH-)n (s), polyehylene 3. Ni(s) + 4 CO (g) Ni(CO)4 (g) 4. H + (aq) + ClO (aq) HOCl (aq) 3. For he auoionizaion of waer a 5 o C, H O (l) H + (aq) + OH (aq) K w is.0 x 0 4. Wha is G o for he process? A. 80 kj/mol B. 40 kj/mol C. 0 kj/mol D. +40 kj/mol E. +80 kj/mol 4. The number of unpaired elecrons in he low-spin complex, [Co(CN) 6 ] 3 is A. 0 B. C. D. 4 E. 5
4 5. Which one of he following compounds is likely o be colorless? A. [Zn(OH ) 6 ] + B. [Cu(OH ) 6 ] + C. [Fe(OH ) 6 ] + D. [Cr(OH ) 6 ] + E. [V(OH ) 6 ] + 6. Which ype of solid is ypically flexible and insulaing? A. Solid meal B. Molecular solid C. Solid polymer D. Ionic solid E. Nework covalen solid 7. Which elemen could be used o dope silicon o creae a n-ype semiconducor? A. B B. P C. C D. Ge E. Al 8. Inorganic maerials ha are insulaors have an average of valence elecrons per aom. A. B. C. 3 D. 4 E Wha is he bond order of he heeronuclear diaomic anion NO? Use he M.O. Energy diagram below. A. B..5 C. D..5 E Pick he polymer(s) ha are made by condensaion polymerizaion reacions A.,, and 3 B. and 3 C. and 3 D. only E. 3 only. Polyehylene. Polyamide 3. Polyeser
5 . For he following reacion, he experimenally deermined rae law is: rae= k[br ]. Br (aq) + HCOOH(aq) Br (aq) + H + (aq) + CO (g) Which of he following saemen(s) are rue?. As he reacion proceeds and [Br ] decreases, he rae of reacion will decrease. The concenraion of HCOOH does no affec he reacion rae 3. The reacion rae will increase a a higher emperaure A. only B. only C. 3 only D. and 3 only E., and 3. The gas phase decomposiion of nirous oxide (N O) is believed o occur via wo elemenary seps: Sep : N O N + O (slow) Sep : N O + O N + O (fas) Wha is he rae law based on he proposed reacion mechanism? A. rae=k[n O] B. rae=k[n O][O] C. rae=k[n O] D. rae=k[n O] [O] E. rae=k([n ] [O ]/[N O] ) 3. Radioacive 4 C likely undergoes: -decay -decay C. posiion emission D. elecron capure E. nuclear fission 4. Which of he following when dissolved in waer will form an acidic soluion? A. and B. and 3 C. only D. and 4 E.,, and 4. FeCl 3. NH 4 Cl 3. Na CO 3 4. NaHSO 4 5. A cerain reacion has a posiive H and a negaive S. This reacion A. will become sponaneous a higher emperaures. B. will become sponaneous a lower emperaures. C. will always be sponaneous regardless of emperaure. D. will never be sponaneous. E. none of he above saemens are rue 6. Wha is he coefficien of he hypochlorie ion when he following equaion is balanced in a basic soluion? ClO + S O 3 Cl + SO 4 A. B. C. 3 D. 4 E. 5
6 7. Which of he following reacions will occur sponaneously as wrien? A. 3Fe + (aq) + Cr 3+ (aq) Cr (s) + 3Fe 3+ (aq) B. Cr 3+ (aq) + 3Sn + (aq) 3Sn 4+ (aq) + Cr (s) C. Sn 4+ (aq) + Fe + (aq) Sn + (aq) + Fe (s) D. Sn 4+ (aq) + Fe + (aq) Sn + (aq) + Fe 3+ (aq) E. Cr (s) + 3Fe + (aq) Fe (s) + Cr 3+ (aq) 30. Which of he following saemens is rue for a 0.0 M soluion of a weak acid HA? A. The ph is.00 B. [HA] >> [A ] C. [HA] = [A ] D. [HA] = [H + ] E. [H + ] >> 0.0 M 8. For he following reacion: 3 Zn(s) + Cr 3+ (aq) 3 Zn + (aq) + Cr(s) Wha is he emf when [Cr 3+ ]=0.00 M and [Zn + ]= M? A. 0.0 V B V C V D V E. 0.0 V 3. The ph of a 0.30 M soluion of a weak base is Wha is he K b of he base? A B C. 3 x 0 3 D. 5 x 0 5 E. 7 x The radioacive isoope 38 Pu, used in pacemakers, decays by emiing an alpha paricle wih a half-life of 86 years. Given ha iniially.00 mg of 38 Pu was presen in he pacemaker, how much 38 Pu will be lef afer 0 years? A..00 mg B mg C mg D. 0.3 mg E. 0 mg 3. For he reacion: Fe O 3(s) + 3 CO(g) Fe(s) + 3 CO (g) 3.3 kj/mol. Calculae he sandard free energy of formaion of he ferric oxide, Fe O 3 f of CO = f of CO = 394 kj/mol. A kj/mol B. 3.3 kj/mol C kj/mol D. 740 kj/mol E. +53 kj/mol
7 33. The solubiliy of which of he following compounds increases in acidic soluions? A. only B. 3 only C. 4 only D. and 3 only E., 3 and 4 only. AgBr. Mg(OH) 3. CaF 4. PbS 34. A soluion is 0.0 M in Br, CO 3, Cl, I and SO 4. Which compound will precipiae ou firs as silver ions are added o he soluion? A. AgBr (K sp =7.7 x 0 3 ) B. Ag CO 3 (K sp = 8. x 0 ) C. AgCl (K sp=.6 x 0 0 ) D. AgI (K sp=8.3 x 0 7 ) E. Ag SO 4 (K sp =.5 x 0 5 ) 35. Which of he following is he bes oxidizing agen? A.Fe 3+ (aq) B. Cl (aq) C. Fe (s) D. Mg + (aq) E. Cu (s) 36. How many coulombs of elecriciy are required o generae 0.67 g of Ag from he elecrolysis of an aqueous AgNO 3 soluion? A. 00 coulombs B. 400 coulombs C. 600 coulombs D. 800 coulombs E. 000 coulombs 37. Which compound, when used as he semiconducor in a ligh-emiing diode, would emi ligh a he shores wavelengh? A. GaN B. GaP C. GaAs D. InAs E. AlSb 38. Wha is he molar solubiliy of calcium phosphae? K sp for Ca 3(PO 4) =. x 0 6 A.. x 0 6 B.. x 0 3 C..6 x 0 6 D..9 x 0 3 E. 4.0 x 0 Go on o he las page
8 39. Calculae he percen ionizaion of nirous acid in a soluion ha is 0. M in nirous acid (HNO ) and 0.78 M in poassium nirie (KNO ). The acid dissociaion consan of nirous acid is A B. 0.6 C. 5.5 D E In an ocahedral ransiion meal complex, he crysal field spliing energy is 3.3 x 0 9 J. If a soluion is made wih he meal complex, wha color will he soluion be? A. red B. orange C. yellow D. green E. blue END OF EXAM
9 . Sandard Elecrode Poenials Half-reacion E o /(V) F(g) + e F (aq) +.87 HO(aq) + H + (aq) + e HO( ) +.78 Cl(g) + e Cl (aq) +.36 O(g) + 4H + (aq) + 4e HO( ) +.3 Br( ) + e Br (aq) +.07 Ag + (aq) + e Ag(s) Fe 3+ (aq) + e Fe + (aq) I(s) + e I (aq) (q) Cu + (aq) + e Cu(s) Sn 4+ (aq) + e Sn + (aq) Cu + (aq) + e Cu + (aq) H + (aq) + e H(g) 0.00 Pb + (aq) + e Pb(s) 0.6 Sn + (aq) + e Sn(s) 0.36 Co + (aq) + e Co(s) 0.77 Ni +( aq) + e Ni(s) 0.8 Cd + (aq) + e Cd(s) 0.40 Fe + (aq) + e Fe(s) 0.44 Cr 3+ (aq) + 3e Cr(s) 0.74 Zn + (aq) + e Zn(s) 0.76 HO( ) + e H(g) + OH (aq) 0.83 SO4 (aq) + HO( ) + e SO3 (aq) + OH (aq) 0.93 Mn + (aq) + e )Mn(s).8 Al 3+ (aq) + 3e Al(s).66 Mg + (aq) + e Mg(s).37 Na + (aq) + e Na(s).7 Ca + (aq) + e Ca(s).76 Li + (aq) + e Li(s) Consans R = 8.34 J mol K R = 0.08 L-am mol K F = 96,500 coulombs mol h = x 0 34 J-s mass 0 n = amu mass p = amu g = 6.0 x 0 3 amu amp = coul sec Avogadro s no. = 6.04 x 0 3 mol c = x 0 8 m sec J = kg m sec = C-V 3. Equaions G = H T S = nfe Daa Shee G o =.303 RT log K = RT ln K G = G o + RT ln Q G = G o RT log Q E o = log K (a 5 o C) n E = E o log Q (a 5 o C) n [ X ] ph = pk a + log [ HX ] K a x K b = K w = [H + ] [OH ] pk w = ph + poh = pk a + pk b K p = K c (RT) Δn K w = x 0 4 a 5 C ln k = k ln k k = Ae ( a RT ) E a + ln A RT E a = R T ln[a] = ln[a] o k [A] [A] o k T N log = N o 0.30 = k.303 N ln = = k k = N o 4. Diagram of d-orbials for ocahedral complexes Energy Rae = kn E = mc d x² d y², d z² d xy, d yz, d xz E = hν c = λν Name PERIODIC TABLE of he ELEMENTS MAIN GROUPS MAIN GROUPS A H Li 6.94 Na K Rb Cs Fr [3] A 4 Be 9.0 Mg Ca Sr Ba Ra [6] 3B 3 Sc Y La* Ac** [7] 4B 4 Ti Zr Hf Rf [6] 5B 5 3 V Nb Ta Db [6] 6B 6 4 Cr Mo W Sg [66] TRANSITION METALS 7B 7 5 Mn Tc [98] 75 Re Bh [64] 8B 8 6 Fe Ru Os Hs [65] 8B 9 7 Co Rh Ir M [68] 8B 0 8 Ni Pd P [69] B 9 Cu Ag Au [7] B 30 Zn Cd.4 80 Hg [77] 3A 3 5 B Al Ga In Tl A 4 6 C.0 4 Si Ge Sn Pb [85] 5A 5 7 N P As Sb Bi A 6 8 O S Se Te Po [09] 6 [89] 7A 7 9 F Cl Br I A [0] 8A 8 He Ne Ar Kr Xe Rn [] 8 [93] * LANTHANOIDS 58 Ce Pr Nd Pm [45] 6 Sm Eu Gd Tb Dy Ho Er Tm Yb Lu ** ACTINOIDS 90 Th Pa U Np [37] 94 Pu [44] 95 Am [43] 96 Cm [47] 97 Bk [47] 98 Cf [5] 99 Es [5] 00 Fm [57] 0 Md [58] 0 No [59] 03 Lr [6]
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