G_139184_2010-01-07

G_139184_2010-01-07 - ‘ PAGE 1 7/2 d/z/e CHE 1073 TEST...

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Unformatted text preview: ‘ PAGE 1 7/2 d/z/e CHE 1073 TEST III DR. POWELL JULY 26, 2006 Please print your name on both the test paper and the Scan Tron form. SECTION 1 . 1. \Q MULTIPLE CHOICE (4 points each). The following reaction takes place when an electric current is passed through water. It is an example of a reaction. 2H200) *9 2H2(Q)+ 02(9) _ _ a) combination single displacement decomposition ,dT precipitation e) acid—base neutralization H Which products would result from the doublfidisplarcegnent reaction between MgCI2(aq) and Na2003(aq)? tut-rflg a. s\ a ., , . V r .. 4. ,9 t.‘ ‘9 laflu Ha ~33 Na2C|2(aq) and MgCOa(s) . L__.Lx 5 NaCl(aq) and MgCO3(s) __ c) NaCl(aq) and M92C03(s) (/03 3r M0909 d) NaCl(aq) and Mg(C03)2(s) ,ej/MgNa2(aq) and CO3CI2(3Q) When the equatioriDAl(OH)3 +3 st04 > Al2(SO4)3 +6420 is balanced the sum of the coefficients wElHt’Jiei;2 V 1/9 a) 9 /zw c) 11 H 4560 ‘ f/ 12 C? 13 A metal is reacted with oxygen. The resulting compound is placed in water. What class of compounds results? a) An acid b) Water c) An oxide 69 A base e) A salt 24mm _ 1 . PAGE 2 5. The quantitative measurement of amounts of reactants or products in a chemical reaction is called. a) a royal pain. b) empirical formula calculation. c) alchemy. @7 stoichiometry. e) impossible. SECTION 2. PROBLEMS (6 points each). I a. l4.{i]97@}3€>. 6. Consider the following equation; 214.305 4 W W3 ‘- IM N + 6HO—+3M OH + 2NH L .moi “FE/$3 2 2 93( )2 3 lf 50.0 g of magnesium nitride reacts completely with excess water, the number of grams of ammonia produced is 50. ‘ M M; \mongli; 9111;131:393 mogommpfa: E) g ‘Oo'qg “(Walla lmolM‘lallo Mei-AME F .000 16.8 I d) 50.0 e) 5.63 0 \5 @ What volume of 1.15 M K H solution is needed to provide 0.665 moles of KOH? / V P i . . oil 7\ W300 12/, W / 57%, gym a) 173 mL , 2.2.2222 —~—~, J b) 222 mL ‘ U4 MSWQWCSW (1:) 578 mL d) 764 mL e) 182 mL 8. How many moles of CaClz are in 250. mL of a 3.00 M QaClg solution? 95000. \L sown C000 _, F75 a) 750. mol a ' b) 1.33 mol \0- W— l L c 83.3 mol 0.750 mol -‘ 3.00 mol / r; WK / L 9. Calculate the Molarity of a solution that contains 50.0 g of NaOH in 750.0 mL of solution. @30an xii. \l M. / i (.07 a) 0.600M V“. WSL I . b) 0.800 M 354.17”? M ~ 0) 1.07M PAGE 3 W“; >( (.00 : 6’70 770/0 10. Aluminum reacts with bromine to form aluminum bromide: I“ , I Q 2 Al + 3 Br2 —-> 2AlBr3 If 25.0 g of Al and 100. g of Br2 are reacted, and 64.2 g of AlBr3 is recovered, what is the percent yieB/fsgr (all? mag-B T ( «wig rim mag : Qqq' a) 14.6 % 24.94.4541 inolftl \i‘ite‘l'lib’r 44.2 % . I \ ‘ ) 57.7% mafialflo?‘ gm, {Ea filgrg : w .19 d) 3” % “00‘! ‘9 300% i We e) 26.0 % _ _ 11. Ethylene, CZH4, is combusted according to the following equation: C2H4 + 302 “'9 + How many moles n be produced by the reaction of 0.480 mol of CZH4 and 1.08 W!) ~——~——-—— molofOz? ,Hlbb QgfiQQMlengllu/l lelgm4\ ’ \mbllal‘lq \NOVQHH a 0.240 mol m0: LO‘Dowl Wiggllflwfa 3mg! :5 0.864 ’33. 3W0\09 \Nolwa e) 0.450 mol .ANSWER THE FOLLOWING QUESTIONS ON THE TEST PAPER (YOU MUST SHOW ALL OF YOUR WORK IF YOU WISH TO RECEIVE ANY CREDIT!!!) 1. The following reaction produces 76.0% yield of M9003. MgCl2(aq) + Na2003(aq) —-> 2NaCl(aq) + MgCO3(s) What mass of MgC03(s) is recovered from the reaction of 1559 of l 6% (16%”. J9 K. 3. d2} 1 , -" . $3.3le WW ‘ ’ 9" 43.40): 24 4951+ L90 1 88,099 ' (avg , [0% W0“? 2. Calculate the grams of solute in 74.00 mL of 0.800 M Na20204(aq). (8 points) 10‘7qu .%OOM‘MDH 133.499 904.0% ‘ 1” \Nol $916000 ' n - excess of M0033 PAGE 4 3. Complete and balance the following equations and classify them as either combination, decomposition, single or double displacement. Where no reaction will occur, write "no reaction" as the product. (4 points each) _/ c. om Uz @ a) r(3212(9) +15?aBr(aq) q ' ‘ ~ " ’tkl;~c\.rf3\"'»)vx'~'1a)gagwaq) + *t‘INEJaQ) -> W “mm” j‘ “J H“ X W 'V _ r _fi_._-.,.,._-.,,4,._.«_l ‘ C/ cp-Ba(s) + 02(9) COWlbiSNfiq"XL @ p \ "/ ,- ~. d) Zn(s) +ijgN03(aCl) —'> smql’q MMQgSD-Sg—QH’JS 4. Given the equation: ‘3’? ,8? H51:qu 4' UM 5 89L? BaCl2(aq) + K2Cr04(aq) --> BaCrO4(s) + 2 KCl(aq) calculate the number 0 gram of BaCrO4 that can be obtained from) 109. 1 mL f 0.300 M 330'20, m 0L WM \mbl 5mg 3 258 b“ if 7 \ 14 \MQLBGElg mm mm, / 0 K W .lDOO g BOiCrOLil = C t 1 ' -1 5- '3"; l2 fgrid 10113:} 0f SagCCiirgfleacted accordingqué ifigifivfié’ig MgClz + NazCO3 *‘9' 2NaC| + M9003 6‘) 3” ?li88i%“i’\%.%‘%%“9m3l g _ (15W low/We \ .5 u I \ (O I . (:4, .- \GWOQJM\}MOZ \Qgfligmfi 9%» WW3 3 '3) MEX?in $339993 \molmgih \mow’th’é J\ b) How man of the exces rea ent e ains? 5 oin ) man Manila/C0929 \ino A gdér. M 46‘ :3 cg,ng M703 losfimzjliafilfi \ihiwlbwla \NW/fl© m figs/7? :l ,omllgcoal ACTIVITY SERIES Cl2 Brz ...
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G_139184_2010-01-07 - ‘ PAGE 1 7/2 d/z/e CHE 1073 TEST...

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