Fourth Exam Form C Key 1 D 2 C 3 C 4 E 5 B 6 C 7 B 8 D 9 B 10 A 11 B 12 B 13 C4H10O C5H10 14 iron II ion 0 30 M nitrate ion 0 60 M 15 yes or no chemical formula a yes SrSO4 b no none c yes Cd3 PO4 2 16 Cr3 aq 3 OH1 aq Cr OH 3 s 17 2 C4H8NO 13 O2 8 CO2 8 H2O 2 NO2 18 Ni s 2 Ag1 aq Ni2 aq 2 Ag s Eo 1 03 V 19 a H3C H H C C Br H b C3H7Br H O CH3 H3C H H C C Br H H O CH3 1 Which of the following substances would be most soluble in water A SiO2 B CaCO3 C CH3 CH2 10OH D NH3 2 Consider the following five substances How many of them would be strong electrolytes i FeCl3 ii C4H10 iii KNO3 iv Na2CO3 v C5H10O5 A one B two C three D four E all five 3 When dissolving these solids in water note their values of Ksp which is the best statement CaF2 Ksp 4 x 10 11 BaF2 Ksp 1 x 10 6 PbF2 Ksp 3 x 10 8 A PbF2 produces the fewest fluoride ions while CaF2 produces the most fluoride ions B BaF2 produces the fewest fluoride ions while PbF2 produces the most fluoride ions C CaF2 produces the fewest fluoride ions while BaF2 produces the most fluoride ions D BaF2 produces the fewest fluoride ions while CaF2 produces the most fluoride ions E CaF2 produces the fewest fluoride ions while PbF2 produces the most fluoride ions 4 In which of the following is a sulfur atom in the 3 oxidation state A H2S B H2SO4 C H2SO3 D H2S2O3 E H2S2O4 5 Consider the energy diagram on the right for the chemical species G and J Which of the following reactions would be extensive E A G J G2 J2 B G2 J G J2 C G2 J G J2 D Both A and B E Both B and C 6 In the question above which is the best oxidizing agent A G B J C G2 D G2 J G E J2 7 Which of the following unbalanced processes is a four electron reduction A NO NH3 B CO CH3OH C ClO2 ClO1 D 2 H2O O2 E PH3 P 8 A galvanic electrochemical cell is constructed using the Zn2 Zn and Pb2 Pb half reactions What reaction takes place at the cathode A Zn Zn2 2 e1 C Pb Pb2 2 e1 B Zn2 2 e1 Zn D Pb2 2 e1 Pb 9 What is the oxidizing agent in this reaction N2 HPbO21 H2O H2N2O2 OH1 Pb B HPbO21 A N2 C H2O D H2N2O2 E Pb 10 Consider the Co2 Co redox couple which has a reduction potential of 0 28 V Select the best statement regarding the strengths of Co and Co2 A Co is a stronger reducing agent than Cu while Co2 is a stronger oxidizing agent than Al3 B Co is a stronger reducing agent than Ag while Co2 is a stronger oxidizing agent than Fe3 C Co is a stronger reducing agent than Zn while Co2 is a stronger oxidizing agent than Sn2 D Co is a stronger reducing agent than Fe while Co2 is a stronger oxidizing agent than Zn2 11 In the molecule shown which atom is most likely to act as a Lewis acid A oxygen 1 B carbon 2 C carbon 3 D nitrogen 4 1 O O H C C H 2 3 N 4 H CH2 H O H 12 Which statement most accurately describes a Lewis acid base reaction A The Lewis acid provides two electrons to form a new ionic bond B The Lewis base provides two electrons to form a new covalent bond C Each reactant contributes one electron to form a new covalent bond D A positive ion and negative ion come together to form a new ionic bond E The Lewis acid provides two electrons to form a new covalent bond PLACE YOUR ANSWERS FOR 13 19 DIRECTLY ON THIS EXAM 13 5 each In the spaces below write the chemical formula for each of the molecules O 14 4 each What is the concentration of each ion in a 0 30 M solution of iron II nitrate iron II ion nitrate ion 15 18 For each combination of 0 1 M aqueous solutions listed state yes or no whether a precipitate will form IF YES then provide the chemical formula of the solid IF NO write None for chemical formula a Na2SO4 and SrCl2 b Cu C2H3O2 2 and ZnCl2 c Cd ClO4 2 and K3PO4 yes or no chemical formula a b c 16 Write a balanced net equation for the reaction that occurs when 0 1 M aqueous solutions of CrCl3 and KOH are mixed be sure to include states of matter for this question 17 10 Write a balanced equation with integer coefficients for the complete combustion reaction of C4H8NO For this question you do not need to show states of matter 18 10 Write a balanced net equation for the reaction that occurs when Ni is added to an aqueous solution of Ag1 be sure to include states of matter for this question 4 What is the potential of this reaction V 19 a 8 Diagram the following reaction using curved arrows to indicate electron movement Lone pairs are not shown but may need to be taken into account in your diagram H3C H H C C Br H H O H3C CH3 H H C C Br H b 2 Based on your diagram which reactant is the Lewis acid circle one C3H7Br OCH31 H O CH3
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