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CHE 202 Lecture Notes - Lecture 18: Nucleophile

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purpleweasel861

28 Oct 2020

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University at Buffalo

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Course

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Clizbe Elizabeth

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Document Summary

Sn " ( rxn) most stable carbon bonded to cl ( most c - c ) checklist which rxn to rule out - I - l - c - born holds lg z - p - c - lo - next to 2 - c. A l - carbon = degree of substitution. C . can form stable carbocation ? ( snl. , e , needs stable ( ct . no sn 2. 2 can a et bond be formed . rxn ) is there a b - carbon. , ez) z f strong attacker vs - weak attacker unhappy happy - to attack c rxn] Nucleophile y wants ( arrow head ) Base a attak s h [ e rxn] Happy = stable = unreactive unhappy = unstable = reactive (cid:8869) incomplete octet ( strong) = charge = reactive.

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Related Questions

When equal molar amounts of these sets of compounds are mixed in aqueous solution, which will form a buffer solution? (A) HCl with NaCl (B) HCl with NaOH (C) NaOH with Na_2 CO_3 (D) NH_3 with NH_4 Cl The pH of a 0.0100 M solution of a weak acid, HA, is 3.76. What is the percent ionization of HA for this solution? (A) 0.017% (B) 0.58% (C) 1.7% (D) 5.8% Which is the most prevalent species in a 0.25 M aqueous solution of phosphoric acid, H_3 PO_4? (A) H_3 PO_4 (B) H_2 PO_4^- (C) HPO_4^2- (D) H_3 O^+ Which titration has an equivalence point with a basic pH? (A) titrating NH_3(aq) with HCl(aq) (B) titrating HNO_3(aq) with KOH(aq) (C) titrating HNO_2(aq) with KOH(aq) (D) titrating HClO_4 (aq) with Ca(OH)_2 (aq) Which figure best represents a concentrated aqueous solution of HI? (Water molecules are not shown.) A current of 0.150 A is passed through an aqueous CuSO_4 solution for 10.0 minutes. What mass of Cu is plated out? (Assume 100% yield.) (A) 0.000494 g (B) 0.0592 g (C) 0.0296 g (D) 0.0148 g The oxidation number of carbon changes from _____ in this redox reaction: 2NnO_4^- (aq) + 3C_2 O_4^2- (aq) + 4OH^- (aq) 2MNO_2 (s) + 6CO_3^2 (aq) + 2H O(I) (A) +6 to +4 (B) +4 and +3 (C) +3 to +4 (D) +3 to +6 Which species is the most powerful reducing agent at standard conditions? Na^+ (aq) + e^- rightarrow Na(s) E degree = -2.71 V Fe^2+ (aq) + 2e^- rightarrow Fe(s) E degree = -0.45 V O_2 (g) + 2H_2 O(l) + 4e^- rightarrow 4OH^- (aq) E degree = 0.40 V I_2 (s) + 2e^- rightarrow 2I^- (aq) E degree = 0.54 V (A) Na(s) (B) Fe^2+ (aq) (C) OH^- (aq) (D) I_2 (s) For this galvanic cell reaction 3HNO_2 (aq) + BrO_3^- (aq) rightarrow 3H^+(aq) + 3NO_3^- (aq) + Br^- (aq) the Nernst equation implies that the galvanic cell will have a more negative voltage if you: (A) increase the pH. (B) decrease the Br^- concentration (C) increase the BrO_3^-, concentration. (D) increase the NO_3^- concentration. The reaction Zn(s) + Ni^2+ (aq) rightarrow Zn^2 (aq) + Ni(s) occurs in the galvanic cell shown. Which statement is true? (A) Electrons flow to the Zn electrode. Na^+ ions flow toward the Ni electrode. (B) Electrons flow to the Zn electrode. Na^+ ions flow toward the Zn electrode. (C) Electrons flow to the Ni electrode. Na^+ ions flow toward the Ni electrode. (D) Electrons flow to the Ni electrode. Na^+ ions flow toward the Zn electrode.

How do you solve #8?

Brooklyn College of C.U.N.Y Spring 209 Chemistry 1.2 Makeup Midterm Exam Lab. Sectio Physical Constants R-0.0821 L.atrn /mM1 K: 1 atrm-760 Torr; h-6.626 x 10" Js. c-300 x 10' mis Multiple Choice Question4 points each. Circle the correct choice I. How many orbitals are there in the n - 3 shel 2. Which of the following is not a valid set of four b6 ( 4)12 e) none of the preceding choices quantum numbers to describe an electron in an atom? 3. Which pair of elements would you expect to exhibit the most similar physical and chemical peoperties? a) As and Se Na and ci As and Sb s) B and Bensnp 4) The rn unpaired electrons in the ground state of an atom of Co is... ree (C) five (D) seven (E) none of the preceding choices 0è®ä¸ä½å£ wch of the following processes is exothermic? a) lonization of a sodium atom b) Formation of gaseous Which of the following bonds is the most polar? a) N-O b)o-F ) B-o )so e)all are equally polar t what temperature (in C) will 25.0 g of carbon dioxide (at 1.00 atm) occupy 21.3 L? 8Â°C b) 461 C c) -263Â°C d)-270Â°C e) 113Â°C How many times more rapidly will hydrogen (H,) gas effuse through a pinhole than will deuterium ( Deuterium is an isotope of hydrogen with a molecular mass of 4.0 g'mole. (A) 2 (B)2 (C)2v2 (D)4 9, Which of the following arrangements from lowest to highest in first ionization energies is correct ? 10. In which of the following compounds obeys the octet rule? a) XeF b) BF, c) CIO d) SO, pone of the preceding choicees 11. The bright spectral lines observed in the emission spectrum of a flame or gas discharge tube are due to a) the absorption of light at specific wavelengths b) the formation of an excited state of atoms the transition of an atom from an excited state to a lower energy state d) the change from anti-parallel to parallel electron spins in an atom oxygen at 25 Â°C. Comparing the pressure of the hydrogen to the exygen, the ratio will be From Bond Dissociation Enthalpies: Î11D (CI-CI)-243 klinolalo (F-F )-159 kJ/mol; Î1lo (CHF)-25 12.A one-liter container is filled with one mole of hydrogen at 25 Â°C.A second one-liter container is filled with or 2CIF(R) alculate the enthalpy, AH, for the chemical reaction: Cl (g)+ F: (g) (a)-147 kJ (b)-108 kJ (c) +171 kJ (d) +912J (H lou, mory t,hes more rapidy wil, hydrogen w many tes more ro