chem 152 test 4

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Rio Salado Community College *

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Course

101

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Chemistry

Date

Feb 20, 2024

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pdf

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2

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Quiz Submissions - Exam 4 Zoe N Krone (username: zkrone) A ! empt 1 Wri ! en: Apr 30, 2021 5:00 PM - Apr 30, 2021 6:07 PM Submission View Ques " on 1 Select the molecules/ions that act as electropiles in the mechanism: Ques " on 2 Using the reac " on Select the dataset consistent with this mechanism Ques " on 3 Using the following reac " on which statement is correct using entropic analysis : Ques " on 4 In the mechanism given below. Determine the overall reac " on and select the correct statement regarding addi " on of more ( assume all molecules/ions are aqueous) Ques " on 5 Using the reac " on Select the correct energy diagram of the mechanism most likely to occur: Ques " on 6 Based on the mechanism below: Select the correct statement regarding acid - base step: STEP 1 Ques " on 7 In the mechanism: two possible products can be made in step 2: Select the correct statement regarding the rela " ve stabili " es Ques " on 8 Select the energy diagram most consistent with the mechanism Ques " on 9 Using the following reac " on Increasing the temperature of this reac " on is expected to Ques " on 10 Select the molecules/ions that act as nucleophiles in the mechanism below: Ques " on 11 In the ques " on below, the reac " on was performed under condi " ons that contained the phases present: Select the correct D G rxn vs Temperature consistent with the reac " on above: Ques " on 12 In the ques " on below, the reac " on was performed under condi " ons that contained the phases present: Select the statement consistent with the reac " on above: Ques " on 13 Select the molecules/ions that act as intermediates in the mechanism below: Ques " on 14 Using the following reac " on Tripling the concentra " on of H 3 O + and doubling the concentra " on of would Ques " on 15 Select the number of steps in the given mechanism: Ques " on 16 Using a carboxylic acid with pKa = 2.65. Determine the pH at a concentra " on of 0.05 M Ques " on 17 In the ques " on below, the reac " on was performed under condi " ons that contained the phases present: Select the graph of Rate vs [CN-] consistent with the reac " on above: Ques " on 18 In the mechanism given below. Determine the overall reac " on and select the correct statement regarding addi " on of more ( assume all molecules/ions are aqueous) Ques " on 19 Using the reac " on an increase in temperature is expected Your quiz has been submi ! ed successfully. , , , , , , Neither Experiment I nor Experiment II Experiment II only Experiment I and II Experiment I only Reactants are entropically favored due to higher number of configura " ons in the gas phase Reactants are entropically favored due to the very non polar C-C bond present Products are entropically favored due to the higher number of configura " ons in the two products Products are entropically favored due to the very polar C-O bond present Q > K, shi # to products, more NH 3 made Q > K, shi # to reactants, less NH 3 made Q < K, shi # to reactants, less NH 3 made Q < K, shi # to products, more NH 3 made Step 1: is expected to be reactant side ( le # side) favored, K>1 Step 1 : is expected to be product side ( right side) favored, K>1 Step 1: is expected to be product side ( right side) favored, K<1 Step 1 : is expected to be reactant side ( le # side) favored, K<1 Intermediate C is predicted to be more stable to resonance factors Intermediate C and D are expected to be equally stable Intermediate C is predicted to be more stable due to a posi " ve charge located on the less electronega " ve atom Intermediate C is predicted to be more stable due to bond polariza " on factors decrease the rate lower the equilibrium constant Increase the rate and increase the equilibrium constant Increase the rate and change Q but equilibrium constant remains the same Increase the rate and lower the equilibrium constant , , , , , . , . The A-B bonds in the reactants are stronger than A-A bonds in the products, D H rxn > 0 The A-A bonds in the reactants are weaker than A-B bonds in the products, D H rxn > 0 The A-A bonds in the reactants are weaker than A-B bonds in the products, D H rxn < 0 The A-B bonds in the reactants are stronger than A-A bonds in the products, D H rxn < 0 , , , , , , , Increase the rate by 2 increase the rate by 6 increase the rate by 3 increase the rate by 12 2 3 4 1 1.5 2.65 2.0 0.01 rate forward > rate reverse, shi # to reactants, less NH 3 made rate forward < rate reverse, shi # to reactants, less NH 3 made rate forward > rate reverse, shi # to products, more NH 3 made rate forward < rate reverse, shi # to products, more NH 3 made to increase the amount of OH- in solu " on at equilibrium since the reac " on is predicted to be D H rxn > 0 to decrease the amount of OH- in solu " on at equilibrium since the reac " on is predicted to be D H rxn < 0 to decrease the amount of OH- in solu " on at equilibrium since the reac " on is predicted to be D H rxn > 0 to increase the amount of OH- in solu " on at equilibrium since the reac " on is predicted to be D H rxn < 0
Ques " on 20 Using the reac " on Delta H (rxn) = +62 kJ/mol Delta S ( rxn) = -127 J/mol K Calculate K at 298 K Ques " on 21 Using the following reac " on Select the major product Ques " on 22 Using the reac " on Select the image that best represents the first step of the mechanism Ques " on 23 Select the molecules/ions that act as acids in the mechanism Ques " on 24 In the ques " on below, the reac " on was performed under condi " ons that contained the phases present: Select the statement consistent with the reac " on above: I. The last step of the reac " on is Intermediate--nucleophile bond forming II. the reac " on does not have an intermediate III. [F-] ini " ates the reac " on Ques " on 25 Using the following reac " on Which of the following graphs best represents the change in the concentra " on of reactants (R) and products (P) as a func " on of " me a low T : Done 3x10 40 product favored 3x10 -18 reactant favored 3x10 17 product favored 3x10 -41 reactant favored , , , , , II only I and II II and III I only
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