Organic Chemistry: Principles And Mechanisms: Study Guide/solutions Manual (second)
2nd Edition
ISBN: 9780393655551
Author: KARTY, Joel
Publisher: W. W. Norton & Company
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Question
Chapter 2, Problem 2.61P
Interpretation Introduction
(a)
Interpretation:
Hydrophilic and hydrophobic portions of the molecule Pentaerythrityl palmitate are to be identified.
Concept introduction:
Non-ionic detergents contain molecules with hydrophilic head groups that are uncharged. The polar portion of the molecule can interact with water via dipole-dipole interactions and thus, it is the hydrophilic head group. The long straight hydrocarbon chain which is non-polar can interact with itself via induced dipole-induced dipole interactions.
Interpretation Introduction
(b)
Interpretation:
Micelle that would form, if the compound Pentaerythrityl palmitate was dissolved in water, is to be depicted.
Concept introduction:
Detergents are long-chain molecules that are ionic on one end and highly non-polar on the other end. Non-ionic detergents are dissolved in water as micelles, in which, the polar groups are arranged on the exterior, and the hydrocarbon (non-polar) tails are arranged on the interior.
Interpretation Introduction
(c)
Interpretation:
Intermolecular interactions that are primarily responsible for the solubility of micelle in water are to be determined.
Concept introduction:
In a micelle, the nonpolar tails are on the inside of the sphere, where they can interact with one another via extensive induced dipole–induced dipole interactions, whereas the polar groups, that are on the outside, can form the greatest number of hydrogen bonds with the surrounding water molecules.
Interpretation Introduction
(d)
Interpretation:
Advantages of nonionic detergent over ionic detergent in hard water are to be determined.
Concept introduction:
Hard water contains significant concentrations of Calcium and Magnesium ions. Detergents are long-chain molecules that are ionic/polar on one end and highly non-polar on the other end. Non-ionic detergents are unaffected by hard water, as they do not form scum with the salts of calcium and magnesium ions in hard water. Ionic detergents bind more strongly to the calcium and magnesium ions which results in the formation of scum which persists on clothes. This is the main advantage of nonionic detergents over ionic detergents in hard water.
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3. Propose a synthesis for the following transformation. Do not draw an arrow-pushing
mechanism below, but make sure to draw the product of each proposed step (3 points).
CN
+ En
CN
3) Propagation of uncertainty. Every measurement has uncertainty. In this problem, we'll
evaluate the uncertainty in every step of a titration of potassium hydrogen phthalate (a
common acid used in titrations, abbreviated KHP, formula CsH5KO4) with NaOH of an
unknown concentration.
The calculation that ultimately needs to be carried out is:
concentration NaOH
1000 x mass KHP × purity KHP
molar mass KHP x volume NaOH
Measurements:
a) You use a balance to weigh 0.3992 g of KHP. The uncertainty is ±0.15 mg (0.00015
g).
b) You use a buret to slowly add NaOH to the KHP until it reaches the endpoint. It takes
18.73 mL of NaOH. The uncertainty of the burst is 0.03 mL..
c) The manufacturer states the purity of KHP is 100%±0.05%.
d) Even though we don't think much about them, molar masses have uncertainty as well.
The uncertainty comes from the distribution of isotopes, rather than random
measurement error. The uncertainty in the elements composing KHP are:
a. Carbon:
b. Hydrogen:
±0.0008…
Don't used hand raiting and don't used Ai solution
Chapter 2 Solutions
Organic Chemistry: Principles And Mechanisms: Study Guide/solutions Manual (second)
Ch. 2 - Prob. 2.1PCh. 2 - Prob. 2.2PCh. 2 - Prob. 2.3PCh. 2 - Prob. 2.4PCh. 2 - Prob. 2.5PCh. 2 - Prob. 2.6PCh. 2 - Prob. 2.7PCh. 2 - Prob. 2.8PCh. 2 - Prob. 2.9PCh. 2 - Prob. 2.10P
Ch. 2 - Prob. 2.11PCh. 2 - Prob. 2.12PCh. 2 - Prob. 2.13PCh. 2 - Prob. 2.14PCh. 2 - Prob. 2.15PCh. 2 - Prob. 2.16PCh. 2 - Prob. 2.17PCh. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. 2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - Prob. 2.24PCh. 2 - Prob. 2.25PCh. 2 - Prob. 2.26PCh. 2 - Prob. 2.27PCh. 2 - Prob. 2.28PCh. 2 - Prob. 2.29PCh. 2 - Prob. 2.30PCh. 2 - Prob. 2.31PCh. 2 - Prob. 2.32PCh. 2 - Prob. 2.33PCh. 2 - Prob. 2.34PCh. 2 - Prob. 2.35PCh. 2 - Prob. 2.36PCh. 2 - Prob. 2.37PCh. 2 - Prob. 2.38PCh. 2 - Prob. 2.39PCh. 2 - Prob. 2.40PCh. 2 - Prob. 2.41PCh. 2 - Prob. 2.42PCh. 2 - Prob. 2.43PCh. 2 - Prob. 2.44PCh. 2 - Prob. 2.45PCh. 2 - Prob. 2.46PCh. 2 - Prob. 2.47PCh. 2 - Prob. 2.48PCh. 2 - Prob. 2.49PCh. 2 - Prob. 2.50PCh. 2 - Prob. 2.51PCh. 2 - Prob. 2.52PCh. 2 - Prob. 2.53PCh. 2 - Prob. 2.54PCh. 2 - Prob. 2.55PCh. 2 - Prob. 2.56PCh. 2 - Prob. 2.57PCh. 2 - Prob. 2.58PCh. 2 - Prob. 2.59PCh. 2 - Prob. 2.60PCh. 2 - Prob. 2.61PCh. 2 - Prob. 2.62PCh. 2 - Prob. 2.63PCh. 2 - Prob. 2.64PCh. 2 - Prob. 2.65PCh. 2 - Prob. 2.66PCh. 2 - Prob. 2.67PCh. 2 - Prob. 2.68PCh. 2 - Prob. 2.69PCh. 2 - Prob. 2.70PCh. 2 - Prob. 2.71PCh. 2 - Prob. 2.72PCh. 2 - Prob. 2.1YTCh. 2 - Prob. 2.2YTCh. 2 - Prob. 2.3YTCh. 2 - Prob. 2.4YTCh. 2 - Prob. 2.5YTCh. 2 - Prob. 2.6YTCh. 2 - Prob. 2.7YTCh. 2 - Prob. 2.8YTCh. 2 - Prob. 2.9YTCh. 2 - Prob. 2.10YTCh. 2 - Prob. 2.11YTCh. 2 - Prob. 2.12YTCh. 2 - Prob. 2.13YTCh. 2 - Prob. 2.14YTCh. 2 - Prob. 2.15YTCh. 2 - Prob. 2.16YTCh. 2 - Prob. 2.17YTCh. 2 - Prob. 2.18YTCh. 2 - Prob. 2.19YTCh. 2 - Prob. 2.20YT
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