9. Consider the molecule of palmitic acid that is shown below. Draw a figure to show the behaviour of this molecule when it is added to an aqueous solution in high concentration. In your answer, describe what motivates the behaviour of palmitic acid in aqueous solution. HO

9. Consider the molecule of palmitic acid that is shown below. Draw a figure to show the behaviour of this molecule when it is added to an aqueous solution in high concentration. In your answer, describe what motivates the behaviour of palmitic acid in aqueous solution. HO

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter11: Solutions

Section: Chapter Questions

Problem 36P

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The reaction just described is reversible. Deprotonation of the conjugate acid of an organic base by water provides another example of simultaneous making and breaking of sigma bonds. Thus, in the deprotonation of anilinium ion by water, the base is water, which has unshared electrons on the ________ atom. The acid is ________ ion. A pair of ________ electrons on the oxygen atom of water is pushed toward the ________ atom. Simultaneously, the pair of ________ electrons between the hydrogen and ________ atom of the anilinium ion is pushed toward the ________ atom. Thus, the oxygen- ________ sigma bond is made and a hydrogen- ________ sigma bond is broken. The nitrogen atom, which possessed a positive charge, is now ________, and the oxygen atom, which was neutral, now possesses a formal ________ charge.
The preparaons of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at equilibrium. You can leave out water itself. Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the formulas of the species that will act as neither acids nor bases in the 'other' row. You will find it useful to keep in mind that HCN is a weak acid. acids: 1 mol of NaOH is added to 1.0 L of a 0.7 M HCN bases: solution. other: 0.57 mol of HCl is added to acids: 1.0 L of a solution that is bases: I 1.5M in both HCN and NaCN. other: I Explanation Check 2021 McGraw.HiN Education. All Rights Reserved Terms of Use Privacy I Accessibility acer 8. O O
The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major specles present at equilibrium. You can leave out water itself. Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the formulas of the species that will act as neither acids nor bases in the 'other' row. You will find it useful to keep in mind that HF is a weak acid. ロ□ロ acids: 00.. 0.7 mol of NaOH is added to bases:| 1.0 L of a 0.7M HF solution. other: acids: 0.09 mol of NaOH is added to 1.0 L of a solution that is bases: 0.5M in both HF and KF. O other:
7b. What is the strongest intermolecular interaction that would occur between a molecule of NH3 with a molecule of SbH3? 7c-d. In aqueous solution, NH3 (aq) acts as a weak base. 7c. When NH3 is added to otherwise pure water, we would expect: (circle answers) The concentration of OH- (aq) to: (i) increase (ii) decrease (iii) stay the same The pH to: (i) increase (ii) decrease (iii) stay the same
You found a bottle of aqueous solution in the laboratory cabinet. Unfortunately, the label has been eroded and you could not recognize it. To the best of your recollection, it may be one of the following solutions:  HCl  CH3COOH  CH3CH2COOH  A mixture of HF and NaF (both of substantial amount)  A mixture of H3PO4 and NaH2PO4 (both of substantial amount)  NH4Cl  NaHCO3 In order to identify the solution, you conduct the following experiments: Using a pH meter, you determine the pH of the solution to be 3.00. You dilute 20 mL of the solution with water to a total volume of 200 mL and measure the pH again, this time it reads 3.50. You take some volume of the solution, add phenolphthalein, and titrate it with NaOH solution until the mixture turns pink. You record the volume of the required titrant as Vt and the pH meter reads 9.05. In a separate flask, you take the same volume of the unknown solution as in step iii and titrate it with the same NaOH…
You found a bottle of aqueous solution in the laboratory cabinet. Unfortunately, the label has been eroded and you could not recognize it. To the best of your recollection, it may be one of the following solutions: HCl CH3COOH CH3CH2COOH A mixture of HF and NaF (both of substantial amount) A mixture of H3PO4 and NaH2PO4 (both of substantial amount) NH4Cl NaHCO3 In order to identify the solution, you conduct the following experiments: i.Using a pH meter, you determine the pH of the solution to be 3.00. ii. You dilute 20 mL of the solution with water to a total volume of 200 mL and measure the pH again, this time it reads 3.50. iii. You take some volume of the solution, add phenolphthalein, and titrate it with NaOH solution until the mixture turns pink. You record the volume of the required titrant as Vt and the pH meter reads 9.05. iv. In a separate flask, you take the same volume of the unknown solution as in step iii and titrate it with the same NaOH solution, but this time…
You have a solution of the three molecules below in a suitable organic solvent. NH₂ ملو OH In addition to the organic solvent and the three molecules, you have access to the following solutions: 1 M NaOH 1 M HCI 1 M CH3COOH 1 M Na2HPO4 Outline a method for how you would separate this solution into its component parts and briefly explain your rationale. You do not need to provide the level of detail shown in the Experimental; just the basics will be sufficient (e.g. wash with _____ to separate component __, then wash with _____ to separate component Y, etc.). Hint: you might need to search their pką values! You can write in paragraph style or organize your steps in a numbered list. 111)
4 of 15 > Calculate the standard enthalpy of reaction, AHxn, of each of the given acid-base neutralization reactions involving the strong base KOH. The standard enthalpy of formation data are provided. $ = R Compound or Ion Standard Enthalpy of Formation (kJ/mol) -482.4 -285.8 -98.4 -349.5 -121.0 -372.1 -132.5 -80.3 -251.2 AHixn = F KOH(aq) H₂O(1) HCIO3(aq) KCIO₂ (aq) V HBr(aq) KBr(aq) NH(aq) HCIO3(aq) + KOH(aq) → KCIO3(aq) + H₂O(1) NH, (aq) K+ (aq) G Search or type URL % 5 T G B MacBook Pro 6 Y H & ve 7 N U J 00 8 M I ( 9 K O < H O L command A P Δ' 1 - ; 3 Question option [ + 11 + 21 = ? kJ/mol 11
Select the correct answers: “Ocean acidification is a process that occurs when atmospheric carbon dioxide dissolves in the ocean and is subsequently converted into (methane; carbonic acid; carbonate ions; sodium carbonite) . This then causes the pH of the ocean to (increase; decrease; fractionate; multiply) and become more acidic.”
24. Methylamine, CH3NH4 is a weak base that ionizes in solution as shown by the following equation. CH3NH2 + H20 5 CH;NH;* + OH- (a) At 25 °C, the percentage ionization in a 0.160 molar solution of CH3NH2 is 4.7%. Calculate JOH], [CH3NH3'], [CH3NH2], [H3O*], and the pH of a 0.160-molar solution of CH3NH2 at 25 °C.
5. Complete the table: Chemical System 1. 1 М КСI 2. 1 M H2SO4 3.1 М КОН 4. 1 M HE 5. 1 M AI(OH)3 6. 1 М НСI 7.1 M table sugar Type of Substance | Intensity of Light Classification Typeofsubstance- ionic, strongacid, strong base, weak acid, weak base, organic which is neither an acid norbase
You are planning to determine the concentration of acid in vinegar by titration with a suitable base. The container of vinegar states that the acetic acid concentration in the vinegar is 10%.Suggest a suitable titration to carry out this determination (note all reagents) and estimate the amount of 0.01 mol/l alkali solution that you will require for your class group (assuming 3 titrations by 10 students). Indicate the alkali solution that you will use.