H 3. a) Showing arrow-pushing, draw the products of these acid-base reactions. [10 pts Нас H-N...
2. (a) (i) Draw an arrow-pushing mechanism that illustrates the electron flow in the acid-base reaction below. Use the structures shown below in your arrow-pushing mechanism. (4pts for correct mechanism). (ii) Using pKa values indicated in Table 1.8 (round to nearest whole number) and estimate the equilibrium constant for this reaction (Keq). Show work which led to this value. (3pts for work, 1pt for correct Keq indicated). (iii) Draw a base (assuming the same acid provided below) that would reverse...
3. a) For the following reaction, label the acid and the base. Then draw the structures of the conjugate acid and base. н ............ conjugate acid conjugate base b) Clearly show the movement of electrons (arrow-pushing mechanism) for the reaction. c) Write the pka values under the acid and conjugate acid. Draw your equilibrium arrow to favor the direction toward the weaker acid (think about what the pka value tells you about acidity).
Acid-base reactions (5 pts total) 3. (a) (2 pts) The acids are missed from the following acid-base reactions. Fill the missing acids to complete the acid-base reaction and label all Hs that are transferred in the acid-base reaction. (b) (2 pts) Draw curved arrows on the reaction above to complete the arrow-pushing mechanism of this acid-base reaction. Products Reactants (c) (1 pt) The equilibrium will favor (circle one): 4. Cycloalkane (12 pts) (a) (6 pts) Properly name the tri-substituted cycloalkane...
7. a) Two acid base reaction are shown below. Complete the reactions, i.e. draw the conjugate bases and conjugate acids in the products for the two reactions. 2 pts NH2 NH2
A)For each of the following proton transfer reactions (a) draw the products, (b) estimate the pKa’s of the acid and conjugate acid. (Use the functional group to estimate the pKa) B) Circle which side is favored at equilibrium in each of the reactions above (4) (a) For each of the following proton transfer reactions (a) draw the products, (b) estimate the pKas of the acid and conjugate acid. (Use the functional group to estimate the pKa. (12 pts) conjugate acid...
1 a) Write the aqueous acid dissociation reactions for an acid and base dissociation reaction for a base according to the Bronsted-Lowry definition b) Determine conjugate bases of acids and acids of bases c) Write the equilibrium expression for an acid or a base aqueous dissociation d) Evaluate strength of an acid or base based on its Ka or Kb or pKa or pKb. e) Apply Kw at 25oC and at different temperatures. f) Solve for the pH of strong...
Question 39 1 pts A weak acid (HA) reacts with a weak base (B) to form the conjugate base of the acid (A) and the conjugate acid of the base (B-H the pKa of HA was 4.8 and the pKa of BH* (i.e., the pKabH of B) was 9.4, what would be the value of the equilibrium constant for the above reaction to the nearest ones? Obviously, by expressing the answer to the nearest ones, we are using too many...
2. For the following acid-base equilibrium H-BH + Acid Base Conjugate Base Conjugate Acid (a) Draw a curved arrow mechanism above to show the transfer of a proton from the starting acid "acetylene" to the starting base "n-butyllithium"(two curved arrows are necessary). (b) Draw the conjugate base of acetylene and the conjugate acid of n-butyllithium, indicating all counter ions and formal charges in the rectangles provided above. (c) Which side. Left or Right, of this equilibrium is favored thermodynamically? What...
Apprica 1. (a) For each of the Bronsted-Lowery acid base reactions below, draw the conjugate acid and conjugate base pairs most likely to form. (b) Circle the set of arrows that best describe the equilibrium for each reaction. (3pts for each correct conjugate pair, 1 pt for each correct set of arrows) equilibrium arrows conjugate base conjugate acid (0) -H + он conjugate base conjugate acid (II) NaH + conjugate base conjugate acid
Question 5 (37 pts.) Give a curved arrow pushing mechanism for the following reactions, and... 1) Show ALL important resonance contributors for all intermediates. 2) Add non-bonding electrons and C-H bonds to the line-angle structures as required. 3) Indicate the Lewis acid/.ewis base (LA, LB) at each step as appropriate, and whether they are also Bronsted acids/bases (LA/BA, LB,BB) 4) GIVE THE NUMBER OF STEPS IN YOUR MECHANISM H2O OH OH H.C-C-C-CHE CH, CH a) 10: CHỊ HẠC-C-C-CH - number...