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a) Draw the mechanism of this reaction showing the formation of all possible products all while taking into account the stereochemistry.
b) Indicate which product will be predominantly formed and explain your answer through the electronic effects.
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- 1. The reaction below will give us: a. 2b. 4c. 3d. 3 and 4e. 16. (I) HCOj(aq)+ H2O(0) = co(ag)+H3O*(g) (II) HCO3(aq) + H₂O(1) H₂CO3(aq) +OH(aq) In which of the following reactions, H₂O acts as an acid? (III) HPO (aq) + H₂O(l) H₂PO4 (aq) + OH¯(aq) PO (aq)+ H3O*(aq) (IV) HPO (aq) + H₂O(l) (A) I and II (B) None (C) II and III (D) I and IV (E) III and IVA. Determine whether the curved arrow(s) shown below generate a valid or invalid resonance structure. Draw the resonance structure that would result from each properly drawn arrow and identify the arrow pushing pattern (i.e. allylic positive charge, allylic lone pair, pi bond between atoms of a different electronegativity, lone pair adjacent to a positive charge, alternating pi bonds in a ring.
- 2.4 8 (a) Define in words the following: (1) Ka (ii) p.Ka I (b) Calculate the pH of 0.0005 mol dm³ ethanoic acid when its RK₂=4.75 → CH3COOH(aq) +___ H¹ (39) CH3COO (10) K₂ = pH =The ethyl acetate concentration in an alcoholic solution was determined by diluting a 10.00-mL sample to 100.00 mL. A 19.00-mL portion of the diluted solution was refluxed with 40.00 mL of 0.04601 M KOH: CH3 СОО С2H; + ОН — СH3 COO + C2H; ОН After cooling, the excess OH was back-titrated with 3.02 mL of 0.05056 M H2 SO4. Calculate the amount of ethyl acetate (88.11 g/mol) in the original sample in grams. Amount of ethyl acetate =Solid CO2 (0.44 mol) is reacted with CH3MgBr (0.28 mol) in ether solvent. The product of the reaction is isolated in aqueous solution (assume 100% yield) and excess CO2 is removed. Subsequently, HCI (aq) (0.12 mol) is added. What is the pH of the solution that results?
- 4b please answer (predict the outcome and explain briefly3.) In the assay of NaHCO3, 3.0g of the solid is dissolved in 25mL water. What is the normality? How many mL of 1N H2SO4 will be required to neutralize this solution? From this volume of acid, compute the percent purity of NaHCO3.b) Determine the standard enthalpy change and std. Gibbs free energy change of D reaction at 400 k for the reaction CO(g) +2H2(g) → CH;OH (g) At 298.15 K, AH CO (9)= -26.41 kcal/mol, AH.CH,0H(9)= -48.08 kcal/mol, (9)= -32.8079 kcal/mol, AG CH30H(g)= -38.69 kcal/mol, The standard heat capacity of various components is given by, C = a + bT + cT2 + dT³, where C is in cal/mol-K and T is in K b x10² c x105 d x10º Сomponent CH3OH a 4.55 2.186 -0.291 -1.92 CO 6.726 0.04 0.1283 -0.5307 H2 6.952 -0.0457 0.09563 -0.2079
- b. _Pb(NO3), (aq) _KI (aq) _Pbl2 (s) + _KNO; (aq)6. (2 pts) Aqueous solutions of a compound did not form precipitates with Cl', Br', I, SO,²', CO;²', PO4³-, OH", or S2-. This highly water-soluble compound produced the foul-smelling gas H2S when the solution was acidified with HCl (aq). This compound is A) Pb(NO3)2 B) (NH4)2S C) KBr D) Li2CO3 E) AgNO3(b) Sodium hydroxide reacts with propanoic acid in the following equation: NaOH + CH3CH,COOHCH3CH2COONA + HLO A buffer solution is formed when sodium hydroxide is added to an excess of aqueous propanoic acid. (i) Calculate the number of moles of propanoic acid in 50.0 cm of 0.125 mol dm aqueous propanoic acid. (ii) Use your answers to part (b)(i) to calculate the number of moles of propanoic acid in the buffer solution when 2.00 cm' of 0.500 mol dm aqueous sodium -3 hydroxide are added to 50.0 cm' of 0.125 mol dm aqueous propanoic acid. ) Hence calculate the pH of this buffer solution at 298.15 K.