Practice Problems 4 KEY

Practice Problems 4 KEY - CHEMISTRY 1414 Spring 2011...

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Unformatted text preview: CHEMISTRY 1414 Spring 2011 Practice Problem Set 4 Question 1 Balance the following equations a).Cr + 02 ->Cr203 Ll CR 4- got “’3 Z (1103 b).Cqu + o; 9 Cu _+ 303 l. LUIS + 301 _7 L1 CV + 1303 c).C6H5CH3 + 02 9 co2 + VHZO Luke”; ,L (101“) 7 LoL + qHLO d).Fe203 + Mg 9 MgO + Fe Felt); + M) -—) 31470 + 1 Fe e).A1Cl3 + NaOH 9 Al(OH)3 + NaCl AM; + away .9 mm”; +§mq f).NaNO3 + H2804 9 NaZSO4 + HNO3 L [VA/VD; + ngo“ 9) Abilyo‘1 J, 1 Hm) g). NiC03 + HN03 9 Ni(NO3)2 + C02 + H20 N i Log +LHA/n) ~> A/{CA/Dflz + LOU. H10 h).Li + N2 9 Li3N éLi + N: --> LL),N i).TiCl4 + H20 -) Ti02 + HCl T;(l.,‘+ LHLO .9 7,01 + L1H“ j)oNH4N03 9 N2 + 02 + H20 INUHNOZ g) 7"”?- J’ 0L 1’ Li H10 k).Ca3P2 + H20 9 Ca(OH)2 + PH3 LAJZ ,L ML.) .5 gruoml J, UH; 1)- A1(0H)3 + H2804 '9 A12(SO4)3 + H20 1 Al (0 H3): Jr MIN)“ 4; Akin”); 4'- (Hi) m).C2H5NH2 + 02 9 C02 + H20 + N2 LI mag/U141 + ISOZ 9 Mel + IHHLDJv L/t/L Question2 ’ Write the balanced overall, complete ionic, and net ionic equations for the following reactions occurring in aqueous solution: a). Barium chloride reacts with potassium phosphate to yield barium phosphate and potassium chloride. OWN“ 3 Ig‘C‘ILm J'ULJDMLM “‘7 ém'm) 'L 3’5”th 10M“: 3 £41214) + écmm“ (“at”) l" “’0ng ‘) Lt” Wu + L “.1461; + “(Foal . 3- NWIBN‘L: 3&4qu 4' LPOH WM ~) B43UO~A1 (J) b). Potassium chloride reacts with mercury(I) nitrate to yield mercury(I) chloride and potassium nitrate. OUWWZMULM J“ Mimoiiumfi Hi“:le +1LLN03KH) IDA/{L3 lu’+Urq) L 1(Vt/M) 4' l‘l'leblm+ 1”03-Ha) .7 H‘hulm +lk+mflwo NU‘ '- [Mill H‘ltum) + 2“ Ll“) «A Hlltuku) \ 3 Ha) c). Potassium oxalate reacts with iron(III) acetate to yield iron(III) oxalate and potassium acetate. OVQ’U’HZ 3 ML (1,04%) l—lPC [(1 H502) “’5 Fflllfcoqh U) + 6KCLH301 30m Moi) tom“ {KTUM + BLLDqL‘q‘“ ,F LR” 4 (7 (Lle w“ ‘7 ' Fe thzoqlnfl + lawn.“ l LLLHJO;W\} h » Now: 1 Fe ms. ; CL».L A Pal (£1041 Question 3 A solution of K2Cr207 is prepared by dissolving 2.335 g of potassium dichromate in 525 mL of water. What is the concentration of the solution? What are the concentrations of the KL and Cr2072' ions? “Lbklojfl M GA ML MolkLl—Al01 IODOML : O.bl§'LM lemme; lL ' ‘ 5‘}th m worm. ultkzoj W” A Lkifif Chow‘s“, [Nth “WW ‘~ “Moll/n CCMDS] : worm/14 Question 4 What volume in mL of 2.06 M KMnO4 contains 322 g of solute? M W L L Z_Dé Moll/LMNDH ( l{$.027IL/I\NOK) 2 glgjlkM/o“ Moll 371th"“ -__L_\ (IDODAL )1 W") ML S‘olm‘w 21(7‘4Mfloq “- Question 5 What are the concentrations of the ions present in an aqueous solution of each of the following materials: a). 0.12 M BaClz -—9 1341:r 1“) 0341‘}? 011M .CC1‘1= Obi/m b).0.0125MCuSO4 ‘\ CV” + 50 C Cu“)? O-O'ICM CTOJ‘]: 0.131ng c). 0.525 M Na2CO3 ~43 L Ania“ + to: 1m [Amy Low/x C (of): 056M Question 6 A 255 mL sample of a 0.156 M HCl is diluted by taking 25.00 mL of this solution and diluting it with water to a final volume 100.00 mL in a volumetric flask. A 10.25 mL aliquot of this second solution is further diluted with water to a final volume of 125.00 mL in a volumetric flask. What is the concentration of HCl in this final solution? ‘ Pinyi- Din/ho»: LSJVMLL IL Ovlfé MolHtl) 1 3.0lbofllo'3/wl (loooML) = 1.1003461 ’ L Iooom L W ‘L M — SCUM/A 1)} form»; 2.6100 xiv-1w (IO-1941.“ IL ‘- R‘lflflo‘lm‘ 1000M) = 3.113110% lOODML ‘ ‘ _-\ L 1 M UOML H. \\ Question7 Suppose that you have 100.00 mL of a solution of a purple dye and transfer 2.00 mL of this solution to a volumetric flask and dilute it to a volume of 100.00 mL. A 5.00 mL aliquot of this solution is then again diluted to a final volume of 155.00 mL. If the concentration of the final purple dye solution is 1.58 x 10‘4 M, what was the concentration of the original solution? M—V M _\1 , 1.3% NO M01 F-Na1Yolw°”( [L (l§§.°0ML M“ WV 1017.0me l-‘ibilww [oooML ' ‘ L $.00”), 1” Mvmw- LOO/«L 0mm“ 50v w“ ML W : ZHS‘MV‘MH Llama“: 0.7.‘18M \ Question 8 You have a stock solution of 14.8 M NH3. a). How many milliliters of this solution are needed to make 1250 mL of 0.250 M NH3? ELSDML[ ll. 0,Z§DM.\NH§) : 0.385491%, new“; \— lODOML _ L 0.2mm NH; ML HEW) : llJmL b). If 10.0 mL of the stock solution is diluted to a total volume of 0.500 mL, what is the concentration of the final solution? 10,0 L \Lk Winnde : M [‘WDML3[ L 5 o-"(BMM/"H3 N (loooML 0.§00ML ‘L 2730/14 T TN; 7: (owcmmyw 0* TM Mww ...
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Practice Problems 4 KEY - CHEMISTRY 1414 Spring 2011...

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