Chem103F06T2 - Chem103F06 Exam 2A Name Section(20 pts)Place...

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Unformatted text preview: Chem103F06 ' Exam 2A Name ' Section (20 pts)Place the correct answer in the space at the left. C. 1. What is the best name for: CH3 I CH3“- CH2“" C ——“ CH3 1 CH2“- CH3 A) heptane B) 2 — methyl -— 2 - ethylbutane C) 3,3 ... dimethylpentane D) 2,2 — diethylpropane E) 3 — ethyl - 3 - methylbutane D 2. What is the best name for: CH2"_'- CH3 | CHg—C—~—CEC—H l H _ A) hexyne B) 2 — ethyl ~ 3 — butyne C) 3 — ethyl — 1 — butyne D) 3 —- methyl - l -— pentyne E) 3 —— methyl — 4 — pentyne F) 4 — methyl —- 2 — hexyne fl 3. Hydrocarbons containing a carbon ~ carbon triple bond are called? A) alkynes B) alkenes C) cycloalkanes D) aldehydes E) alkanes :3 4. Which of the folloWing contains a double C — 0 bond and a single C — 0 bond? A) ketone B) ester C) alcohol D) amine E) aldehyde 3 5. What is the common name for acetylsalicylic acid? A) orange juice B) aspirin C) acetone D) bananas E) vinegar :1) 6. Which of the following can NOT be a cycloalkane? A) CsHa B) 05le C) CSHIG D) C2H4 E) C4H3 Name 4 g i D 7. What is another name for the molecule phenylamine? A) toluene B) phenol C) nitrobenzene D) aniline E) ethylbenzene Z: 8. Which of the following functional groups does NOT contain a double bonded oxygen? A) carboxylic acid B) ketone C) aldehyde . D) amide E) all contain a double bond D 9. A 20.0 g sample of HF is dissolved in water to give 2.0 x 102 mL of solution. What is the HF concentration of the solution? A) 1.0M B)3.0M C) 0,10M D) 5.0M E)10.M 2 10. Which of the following aqueous solutions contains the largest number of moles of ions? A) "400.0 mL of0.10 M NaCl B) 300.0 mi. of 0.10 M CaClg C) 200.0 mL of 0.10 M FeC13 D) 200.0 mL of0.10 M KBr E) 800.0 mL of 0.10 M sucrose g 11. What volume of 18.0 M sulfuric acid must be used to prepare 1.55 L of 0.195 M H2804? A) 16.8 mL B) 0.0336 L C) 9.23 mL D) 22.6 mL E) 9.32 mL 6 12. Which of the following is a strong acid? A) HF B) KOH C) HC104 D) HClO E) HBIO Z? 13. Which of the following salts is insoluble in water? A) Nags B) K3PO4 C) Pb(N03)2 D) CaClg E) All are soluble D 14. Which of the following ions is most likely to form an insoluble sulfate? A) potassium ion B) lithium ion C) ammonium ion D) plumbous ion E) magnesium ion A3, 15. In which of the following does nitrogen have an oxidation state of +4? A) HN03 B) N02 C) N20 D) NH4C1 E) NaN02 Name 5 é D 16. According to the Bronsted ... Lowry definition, a base is: A) a substance that increases the hydroxide ion concentration in water B) a substance that can donate an electron pair to the formation of a covaient bond C) a substance that increases the aniou formed by the autoionization of the solvent D) a substance that can accept a proton E) a substance that can donate a proton D 17. Which of the following is NOT a conjugate pair? A) H003" / (303‘2 B) H30+ / H20 C) OH' / 0'2 D) H3P04/ HPO4'2 E) 10.1pr / NHzOH Z: 18. Each of the following can act as either a Bronsted acid or base except? A) HS' B) HCOg' C) H20 1)) NH; F.) H3P04 [j 19. What is the mole fraction of benzene in a benzene .... chloroform solution that is 17.5 mole percent chloroform? A) 0.175 B) 0.212 C) 0.250 1)) 0.650 E) 0.825 8 20. A solution contains AgN03 and Cu(NO3)2, which of the following can be added to the ———-_- solution to remove the silver ion but not the copper ion? A) sodium acetate 13) potassium chloride C) potassium perchlorate D) sodium sulfate E) potassium nitrate 11(15 pts) Draw the structure for: A) 4 ~— chloro — 2,5 —— dimethyl — 3 - heptanone 0 634, “6/4" 5'3 cw ~ aha/{4; 2 / l / 04: C! 5%, B) in propylpentanoate 0 (24; I/ I (/4614; C/{ CA; vC—o — c// I C 11/ .3 C) 2,4,6 —trinitrotolu ne f 3 02f} \/ \,;voL / a / \/ / M3,, “ll” ms) 265 mL of 1.20 M lead(11)nitrate was mixed with 305 mL of 1.90 M potassium iodide. MWC equation for the reaction. ,. 76(143); 712$?” *2/(AJQ5LQ; ) 4 7411(3) (196') I) f N 2 .— bHOW 7A; (yd) {- 2! (45) % 714 (.5) WORK B)(5) How- many moles of leadalfiodide agformedg DMrw m”; Praia J. 2(JIVMJ/Uk JIM/4+4}: Elm/{ma 173;“. J, ’ T .575: YWMJJ " haw” ”9M1 257)”?pr ?${W3)z 26:5. 524,4) (Leyla) : 3/4?wa ,Wmu z; “ WWW/~05 KI r gafmzk/Jo M) J 57;!an :- (5. 25—5?!" .352— :J’W’Tr. [0L2 42.:ngR Answer é;2f’0M1/€/’éj 95/11/03.), 3} 3? h . + C)(5) What is the concentration of EC“ in the mixture? fl 3 M ”OK ,4” #46 mm Aim r1 7&1)wa : / p/é x9 0:367:11 Kr Aprv/Kf Ara/1‘ ... Ajagjgmaw £5.70; [Hy/”39‘ /m»(/(I _ / r/W’M mo 3.37.5514 ,2 .43 017. .= a 5701— Answer IV(6 pts) A 5.00 g sample of an unknown metal chloride is completely soluble in water. 70.90 mL of 0.2010 M AgNO3 completely precipitates all of the chloride ion. What is the percentage chloride in the original sample? in" C? .. a = M0 @50 afléwfii) ’3 5.56-be WORK 5 C? A“ MAO w‘é’g'muflfi’a [/M (a, a; €02.)in é.20/0mM/+fi/g MM Cr) (35‘: 5/020? _. away a? r 2. Liz. M f W; Jéryflr V(6 pts) 235 mL of 1.20 M potassium phosphate was mixed with 265 mL of 2.00 M potassium chloride. What is the concentration of potassium ion in the mixture? //" (1M4 09m MK @1007 on; Kai. [M : 75am“? A” SHOW WORK W ,2 (@2351. /p0 M. r20m¥gfiydfmflfi>yqa [A2651 KCC)[ZWMM‘) :23 .. ' 3 7 1.. “{qu _ (2.2357. 2 44245-4) :‘ /« 3% MM new; : “237”” film 4371757‘7/(7‘ 4 Name E1 27 VI(6 pts) For the following reaction, identify the conjugate acid — base pairs. Specify which is the acid and which is the base in each pair. Hsog‘ + CN” 6-) HCN + so;2 VII(4 pts) Calcium hydroxide is dissolved in water until the pH of the solution is 10.94. What is the [OH‘] of the solution? - a W . . I ?fl:/&f‘/ [fly '1 c H) -3. 04: SHOW ‘ m4 = /*/-,0/=/ ,. / 0 WORK 7 79/ - 1/ rfl/l/‘anar' ;f,;a;X/0 5/ 5 3 04’ Answer 6?: g/lefl M VIII(5 pts) How many moles of benzoic acid, a monoprotic acid with K... = 6.4 x 10'5 , must be dissolved in 500.0 mL of water to produce a solution with a pH = 2.50? ‘ 2» J»— flax/740 g/égir f3 “ . .Aésf/éo’JfB‘] Pebgs’w [jg/3072M n ._.._._.. :: , 3/1: 1" SHOW é ax x V 4 DJ?1 03/)(0 can) 0 M WORK ' , — 5", [1.0 c - 1 é" a. «7: x x 4 W m ’ WA 6. 5229! My“); . & s/X/fidfirfl-lféfl fl 5'0}fl;”;;uflg . 2 as 6'4x/a'énswer c? IX(4 pts) A 0.60 M solution of a weak acid (K; 1.7 x 10 ‘8) has a pH of 4.0. What percent of 3126 acid has ionized? DJ 01] m ;7 7 ,g, = __ _ ; J .9 1W4” X/VD Ada/J; U :éafifl Ai- (VJ/’3 Jr/x/VC’) SHOW ; . 4, ' a, a 2c Hm WORK 6 -x x x 73/434 A =20/65va'? L: 1&“Y X X [’L'goljg/xm=)Answer ér 5/7.2 7D . . /: Jaw/0’ 7' 7o X(5 pts) A solutlon of hydrogen peroxide is 30.0% H202 by mass and has a density of 1.11 g/ 1111.. what IS the molil/ltyoof the solution? A; 02' 7/2) 02 = 35/. yV/Mm/ >77: we . . #27; ' M. SHOW #7 6’2. L9 0"“ WORK . .0 U . my. ; LL /M.U;.5Wg& Answer /2’é’ M :é’mo ”/4 02 (”WM 61") aarzmfl 70'0J/JLO(/A/Z/ C’ ‘F‘ flPQJO/{j‘ /mj' .. /Z;4 WM/L/j, Name 7/27 XI(6 When the reaction : Zn + ' -) Zn(OH)4'2 +- NH3 is balanced in base: 8% HO - ’ _ 2 _ __ _ '10 ewe/423m -=-' 3.x 5: +% ,Lze fix/X4798. 7m; é/fl 4. /WJ‘ a Ana/3 aggro r5971»! ~ 6:! é/éa-xw, “affirm/27%: W agar" " .9 ,w/ ,1 ease/M -’~ /J., o @ _ [email protected] ,_ .3 9 “f,” Max/v 5/51 ~—> 4.31m). ¢AV€ A) Water appears on the /{"4£7L and has a coefficient of Q B) The number of moles of electrons changed in the reaction is 59 C) The reducing agent is g. 72$ XII(5 pts) How many mL of 0.356 M barium hydroxide are needed to completely neutralized 58.0 mL of 0.427 M acetic acid? 24/729122 415% any 4; . 31(6/7; cw); + 2/4 0 , r/ amféfi SHOW WORK foC-omL/Mc XIII(5 pts) Detennine if each of the following salts is acidic, basic, or neutral. 1g: CH3000H= 1.8 x10'5;HNOg : 7.1 x 10“4 ; 1~Ic1o2 21.1x10‘2;H010 = 2.9 1810‘8 Kb -. NH3 = 1.8 x 10'5 ; (CH3)2NH = 8.6 x 104; (CH3)NH2 z 4.4 x 1041 A) ammonium perchlorate i 6444 c; B) barium chloride - W C) cesium acetate (64? J/Hc D) dimethylammonium nitrate flax/4 (I E) ammonium chlorite (Pa/z Z. N... y? XIV(12 pts) Use the following code to indicate which functions and bonding the following molecules contain: molecules may contain more than one. A) alkane B) alkene C) alkyne D) cycloalkane E) alcohol F) ester G) ether H) aldehyde I) ketone J) carboxylic acid K)primary amine L) amide M) secondary amine N) tertiary amine 1) CH3CHZCH2CH3 fl 2) cngcnzcnzcoon /—7 J . ' 3) acetone I4 ,1- 4) 'CHgCHCHCHO j g /4/ 5) (CH3CH2)(CH3)2N M 4 at 6) formaldehyde ‘ [Z 7) HOCH2CCCH2COOCH2CH3 C A” E (A09 XV(8 pts) Use the following portion of the activity series to complete the following reactions. All reactants are in aqueous solutions. Activity Series Reactions ,4 2 Li 1)Zn+HCl 9 2’3; 4 1/2 (at?) Ba ' Ca 2) Cu + HNO3 —> /V& 73w . Na ' - +3 A1 3)Al+AgZS-) fl! 5; 7L4? godly/IQ”, Zn Cr 4 . 4) Fe + LiCl 9 a X/U Fe ' Sn 5) Na + Sn(N03)2 —) A/af M) ‘ Pb - a k: H2 Cu ...
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