Fourth Exam Form D Key 1 C 2 B 3 A 4 D 5 E 6 E 7 A 8 C 9 B 10 B 11 D 12 C 13 C3H9N C6H12 14 sodium ion 0 60 M phosphate ion 0 2 M 15 yes or no chemical formula a no none b yes CuBr c yes Cr2 CO3 3 16 2 Ag1 aq S2 aq Ag2S s 17 2 C3H6O2S2 13 O2 6 CO2 6 H2O 4 SO3 18 2 Ag s F2 g 2 Ag1 aq 2 F1 aq Eo 2 07 V 19 a HH H O C H b CH3I HH I H O C H I 1 Which of the following substances would be most soluble in water A Fe2O3 B CH3 CH2 8NH2 C CH3OH D C3H8 2 Consider the following five substances How many of them would be strong electrolytes i C2H6 ii NiCl2 iii CH3I iv H2O v NaNO2 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 CaF2 produces the fewest fluoride ions while BaF2 produces the most fluoride ions B CaF2 produces the fewest fluoride ions while PbF2 produces the most fluoride ions C BaF2 produces the fewest fluoride ions while PbF2 produces the most fluoride ions D PbF2 produces the fewest fluoride ions while CaF2 produces the most fluoride ions E BaF2 produces the fewest fluoride ions while CaF2 produces the most fluoride ions 4 In which of the following is a sulfur atom in the 2 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 G J2 G2 J D Both A and B E Both B and C J G 6 In the question above which is the best reducing agent A G B J C G2 D G2 E J2 7 Which of the following unbalanced processes is a three electron reduction A ClO2 ClO1 B 2 H2O O2 C CO CH3OH D PH3 P E NO NH3 8 A galvanic electrochemical cell is constructed using the Sn2 Sn and Fe2 Fe half reactions What reaction takes place at the anode C Fe Fe2 2 e1 A Sn Sn2 2 e1 B Sn2 2 e1 Sn D Fe2 2 e1 Fe 9 What is the oxidizing agent in this reaction H2PO21 IO1 OH1 HPO32 H2O I1 A H2PO21 B IO1 D HPO32 C OH1 E I1 10 Consider the SbO1 Sb redox couple which has a reduction potential of 0 21 V Select the best statement regarding the strengths of Sb and SbO1 A Sb is a stronger reducing agent than Zn while SbO1 is a stronger oxidizing agent than Sn2 B Sb is a stronger reducing agent than Br1 while SbO1 is a stronger oxidizing agent than Mg2 C Sb is a stronger reducing agent than Ag while SbO1 is a stronger oxidizing agent than Cu2 D Sb is a stronger reducing agent than Ni while SbO1 is a stronger oxidizing agent than Ag1 11 In the molecule shown which atom is most likely to act as a Lewis base A hydrogen 1 B carbon 2 C carbon 3 D nitrogen 4 1 O H 2 O H C C 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 covalent bond B The Lewis acid provides two electrons to form a new ionic bond C The Lewis base provides two electrons to form a new covalent bond D Each reactant contributes one electron to form a new covalent bond E A positive ion and negative ion come together to form a new ionic 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 N 14 4 each What is the concentration of each ion in a 0 20 M solution of sodium phosphate sodium ion phosphate 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 MnBr2 and VSO4 b CuC2H3O2 and KBr c Li2CO3 and Cr NO3 3 yes or no chemical formula a b c 16 10 Write a balanced net equation for the reaction that occurs when 0 1 M aqueous solutions of AgNO3 and K2S 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 C3H6O2S2 For this question you do not need to show states of matter 18 a 10 Write a balanced net equation for the reaction that occurs when Ag is reacted with F2 Assume the presence of water so aqueous ions can be formed be sure to include states of matter for this question b 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 HH H C O HH I H H O C H b 2 Based on your diagram which reactant is the Lewis acid circle one OH1 CH3I I
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