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- 8-28 Will carbon dioxide be evolved as a gas when sodium bicarbonate is added to an aqueous solution of each compound? Explain. (a) Sulfuric acid (b) Ethanol, C2H5OH (c) Ammonium chloride, NH4CICalculate the percentages of dissociated and undissociated forms present in the following solutions: (a) 0.0010 M glycolic acid (HOCH2CO2H; pKa = 3.83) at pH = 4.50 (b) 0.0020 M propanoic acid (pKa = 4.87) at pH = 5.308-36 Given the following values of [OH-], calculate the corresponding value of [H3O+] for each solution. (a) 10-10 M (b) 10-2 M (c) 10-7 M (d) 10 M
- 8-86 Following are three organic acids and the pKaof each: butanoic acid, 4.82; barbituric acid, 5.00; and lactic acid, 3.85. (a) What is the Kaof each acid? (b) Which of the three is the strongest acid, and which is the weakest? (c) What information do you need to predict which of the three acids would require the most NaOH to reach a phenolphthalein end point?HO. COOH 7. (7a) + 2 NaOH _(7b) + NazCOa. +. H2O5. sy For each reaction, identify the acid, base, conjugate acid, and conjugate base. Determine which direction the reaction will favor. Ka H₂SO3 = 1.54 x 10-2 and 1.07 x 10-7 Kb of CH3NH₂ = 4.4 x 10-4 Ka of CH3OH = 3.20 x 10-16 a. CH3O+ NH3 CH3OH + NH₂ b. HSO3 + CH3NH2 H₂SO3 + CH3NH3* c. 2HF + Ca(OH)2 2H₂O + CaF2
- Bn 1) Mel 2) NaH a) b) -NH 1) NANO2/HCI| Cul/MeLi SH COCl2 pyridine -10 °C, THF 2) LIALH4 ОН Yegt MeO2C- -CO,Me TICL, Zn THE NaH, THF reflux OH N, Bn h) Sn, HCI 1) nBuLi, 2) O i) Zn/Cu CH212 S. NO2Calculate the [H+], [C2O4-2], and [H2C2O4] in a 0.0010M H2C2O4 solution. (Ka = 5.4 x 10-2)a) b) C) HBr CH3CH₂OOCH₂CH3 1. Hg(OAc)2, H₂O 2. NaBH4 1) BH₂ / THF 2) H₂O2 NaOH (aq) cold
