6. As the pKa of a proton donor (acid) increases (becomes numerically larger), the nucleophilicity of its conjugate base:

How do Lewis bases/acids affect the pH of a solution? If they are bases, they should cause the OH- concentration to increase or the H+ concentration to decrease. If they are acids, the opposite. However, I don't see how they can do that if they are simply electron acceptors/donors. Can someone explain the mechanism?

pKal pK₂2 Phosphoric acid, H, PO, (aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH and the concentrations of all species in a 0.300 M phosphoric acid solution. 2.16 7.21 [H, PO₁] = M [H*] = [H₂PO¡] = M [OH-] = [HPO ] = M pH = [PO] = M PK₂3 12.32 M M

12. Bicine is an organic compound used as a buffering agent. It is one of Good's buffers and has a pKa of 8.354 at 25 °C. The molecular formula of bicine is C6H13NO4. Bicine can react with Ba(OH)₂ according to the following reaction. 2 C6H13NO4 + Ba(OH)2 → Ba(C6H12NO4)2 + 2 H₂O It took a student worker 3 steps to make a buffer solution. First, a bicine solution is made by dissolving 37.47 grams bicine in enough water. The total volume is 200.00 mL. Then 250.00 mL Ba(OH)2 solution is prepared by adding 36.57 grams Ba(OH)2 solid and enough water. At the end, a buffer solution is made by mixing 157.89 mL of the above bicine solution and 89.32 mL of the above Ba(OH)₂ solution. A. B. Determine the equilibrium concentration of bicine in the buffer solution. Please provider your answer below. Determine the equilibrium concentration of Ba(C6H₁2NO4)2 in the buffer solution. Please provider your answer below. Determine the pH of the buffer solution. pH = Please provider your answer below. 0² 0₂…

Will 3-methylhexanoic acid be positive or neutral with an pH of 6.38?

Conjugate acid base 2) Consider the reaction B:(-) + H3O+ → BH(+) + H2O. For the following named bases: 1) draw the structure of the base, 2) draw the structure of the conjugate acid, 3) give the name of the conjugate acid, and 4) give the approximate pKa of the conjugate acid (±1 pKa unit). For the purposes of answering this question you may use pKa values evenly divisible by 5. Benzoate anion Cyclopentadienide anion Diethyl amine Diethylamide anion pKa pKa pKa pKa

6. For the ionization of phenylacetic acid, C6H5CH₂CO₂H + H₂O = H3O+ + C6H5CH₂CO₂ K₂ = 49 × 10-5 (a) What is [C6H5CH₂CO₂] in 0.186 M C6H3CH₂CO₂H? (b) What is the pH of 0.121 M C6H3CH₂CO₂H?

12. Bicine is an organic compound used as a buffering agent. It is one of Good's buffers and has a pKa of 8.354 at 25 °C. The molecular formula of bicine is C6H13NO4. Bicine can react with Ba(OH)2 according to the following reaction. 2 C6H13NO4 + Ba(OH)2 → Ba(C6H12NO4)2 + 2 H₂O It took a student worker 3 steps to make a buffer solution. First, a bicine solution is made by dissolving 37.47 grams bicine in enough water. The total volume is 200.00 mL. Then 250.00 mL Ba(OH)2 solution is prepared by adding 36.57 grams Ba(OH)2 solid and enough water. At the end, a buffer solution is made by mixing 157.89 mL of the above bicine solution and 89.32 mL of the above Ba(OH)2 solution. A. B. C. Determine the equilibrium concentration of bicine in the buffer solution. Please provider your answer below. A of Ba(C6H12NO4)2 in the buffer solution. Check answer Determine the equilibrium concentration M Please provider your answer below. A pH = Please provider your answer below. A $ Check answer…

Q16. Identify the two acid/conjugate base and base/conjugate acid pairs in the following acid/base reaction: ] Using Evan's pKa table, assign a pka value to the acid and conjugate acid species on the opposite side of the reaction arrow. Use the assigned pka values to predict if the preferred direction for this reaction is forward or backwards. Et;N or + + MeO OMe Et,NH MeO OMe

Conjugate base acid Iso-Butyronitrile pka_ → 1) Consider the reaction AH(+) + H₂O A:+H3O+. For the following named acids: 1) draw the structure of the acid, 2) give the approximate pKa of the conjugate acid (±1 pKa unit), 3) give the name of the conjugate base, and 4) draw the structure of the conjugate base. For the purposes of answering this question you may use pKa values evenly divisible by 5. N-methylimidazolium cation pka_ Triethyl phosphonoacetate pKa _ acid N-Ethylcarbamic pka_