16. Which of the intermediates shown below is generated during the following reaction? H,SO4 OH OCH2CH3 CH3CH,OH H20 b. a. OH HO d. Он OH HO- OCH,CH3 ÒCH,CH3
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- Which of the following reactions result in a positive ∆ Ssys? A. Pb(NO3)2 (aq) +KCl (aq) ---> PbCl2 (s)+ KNO3 (aq) B. HCl (g) + H2O (l) ---> HCl (aq) C. H2 (g) + I2 (g) ---> 2HI (g) D. 2H2O (g) ---> 2H2 (g) + O2 (g) E. H2O (g) ---> H2O (l)(CH3)3CHOH is reacted with CH3-O-C--C6H5 in a transesterification reaction. What is the M+ of the product? || O 102 80 178 None of theseAn elevated level of the enzyme alkaline phosphatase (ALP) in human serum is an indication of possible liver or bone disorder. The level of serum ALP is so low that it is very difficult to measure directly. However. ALP catalyzes a number of reactions, and its relative concentration can be determined by measuring the rate of one of these reactions under controlled conditions. One such reaction is the conversion of p-nitrophenyI phosphate (PNPP) to p-nitrophenoxide ion (PNP) and phosphate ion. Control of temperature during the test is very important; the rate of the reaction increases 1.47 times if the temperature changes from 30 C to 37 C. What is the activation energy for the ALP-catalyzed conversion of PNPP to PNP and phosphate?
- 13*32 Black-and-white photography is a commercial process that involves a phenol. Black-and-white film is coated with an emulsion containing silver bromide or silver iodide crystals that become activated by exposure to light. The activated silver ions then react with hydroquinone in the developing stage as shown in the following balanced equation. All silver halide not activated by light is removed in the fixing process, and the result is a black image (a negative) left by the deposited metallic silver where the film had been struck by fight. In this redox reaction state: What is reduced and what is the reducing agent? What is oxidized and what is the oxidizing agent?2. In the following reactions identify the nucleophile by writing Nu on the atom that does the attacking. Then circle the atom that is the leaving group in the electrophile. a. b. N Br F + + Na Me Iton MeOH olapidmolo-1 ydw niele, brinsw Insbrta staulis pach Maiy book5Br-(aq) + BrO3-(aq) + 6H+(aq) 3Br2(l) + 3H2O(l) The above reaction is expected to obey the mechanism: BrO3-(aq) + H+(aq) HBrO3(aq) Fast equilibriumHBrO3(aq) + H+(aq) H2BrO3+(aq) Fast equilibriumH2BrO3+(aq) + Br-(aq) (Br-BrO2)(aq) + H2O(l) Slow(Br-BrO2)(aq) + 4H+(aq) + 4Br-(aq) products Fast Choose, from the list below, correct expressions for the overall rate law which are completely consistent with the above mechanism. d[Br-BrO2]/dt = k[Br-][BrO3-][H+]2 -d[Br-]/dt = k[Br-][BrO3-]2[H+] -d[H+]/dt = k[BrO3-][Br-][H+]2 k[Br-][H+]2[BrO3-] = -d[Br-]/dt -d[BrO3-]/dt = k[H+]2[BrO3-][Br-] -d[Br-]/dt = k[Br-][H+]2[BrO3-] Tries 0/99 For each of the given rate expressions choose the correct expression for the rate constant (k) from the list below.A. k = k1−k-1B. k = 5×([(k1k2k3)/(k-1k-2)])C. k = 6×([(k1k2k3)/(k-1k-2)])D. k = 6×[(k1+k2+k3)/(k-1+k-2)]E. k = k3F. none of the above -d[H+]/dt -d[Br-]/dt -d[BrO3-]/dt
- Choose the best reagents from the list provided below for carrying out the following conversion. Match the reagent with the step number. HCl (aq), Zn(Hg) KMnO4, H3O+ CH3Cl, AlCl3 HNO3, H2SO4 Cl2, FeCl3 fuming sulfuric acidWhat is the concentration of ethyl acetate at equilibrium if the reaction is carried out with 10 times more ethanol than acetic acid? Hint: Recall thequadratic equation: for ax2 + bx + c = 0,Which of the following reactions result in a positive ∆ Ssys? a. H2O(g) = H2O(l) b. H2(g) + I2(g) = 2 Hl(g) c. C2H2O2(g) = 2CO(g) + H2(g) d. H2O(g) + CO2 (g) = H2CO3(aq)
- This is the type of organic reaction wherein a single reactant splits into two products and is accompanied by the formation of a small molecule. addition substitution elimination condensation What is the name of the angle that a nucleophile approaches the carbon on the C=O bond? Borge-Dante Bürgi–Dunitz Baran-Daly Bunsen-DebyeWhat is Ni(2) doing in this step? Hydrogen donor (Bronsted-Lowry acid) Activating nucleophile Activating electrophile Hydrogen bond acceptor Stabilizing transition state/intermediateTrue or false 1.an intermediate is produced in the SN2 reactiom is a carboncation. 2.In SN1 reactions nucleophile HI will react faster than HCL 3.Halogenated waste can be disposed off in a general waste solvent.