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A procedure15 for determining halogens in organic compounds uses an argentometric

Quantitative Chemical Analysis | 8th Edition | ISBN: 9781429218153 | Authors: Daniel C. Harris ISBN: 9781429218153 475

Solution for problem 26-46 Chapter 26

Quantitative Chemical Analysis | 8th Edition

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Quantitative Chemical Analysis | 8th Edition | ISBN: 9781429218153 | Authors: Daniel C. Harris

Quantitative Chemical Analysis | 8th Edition

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Problem 26-46

A procedure15 for determining halogens in organic compounds uses an argentometric titration. To 50 mL of anhydrous ether is added a carefully weighed sample (10100 mg) of unknown, plus 2 mL of sodium dispersion and 1 mL of methanol. (Sodium dispersion is finely divided solid sodium suspended in oil. With methanol, it makes sodium methoxide, CH3ONa, which attacks the organic compound, liberating halides.) Excess sodium is destroyed by slow addition of 2-propanol, after which 100 mL of water are added. (Sodium should not be treated directly with water because the H2 produced can explode in the presence of O2: 2Na 2H2O n 2NaOH H2.) This procedure gives a twophase mixture, with an ether layer floating on top of the aqueous layer that contains halide salts. The aqueous layer is adjusted to pH 4 and titrated with Ag, using the electrodes in Figure 26-11. How much 0.025 70 M AgNO3 solution will be required to reach each equivalence point when 82.67 mg of 1-bromo-4-chlorobutane (BrCH2CH2CH2CH2Cl; FM 171.46) are analyzed? Usi

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Naming Rings: 1. Identify parent/stem (longest continuous chain) 2. Identify substituents 3. Look for the proximity of the substituents. Count around the ring from st alphabetically 1 substituent to the next: both directions to confirm lowest location numbers 4. Stereochemistry a. Cis- same side b. Trans- opposite side Stereoisomers  Isomers- different compounds with the same atoms  Constitutional isomers- only related by molecular formula  Stereo= 3D difference o Asymmetry between 2 molecules Symmetric molecules  Plane of symmetry down the middle of the molecule (chops the middle atoms in half) Chirality- a generic word that says a 3D object is non-superimposable with i

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Chapter 26, Problem 26-46 is Solved
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Textbook: Quantitative Chemical Analysis
Edition: 8
Author: Daniel C. Harris
ISBN: 9781429218153

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A procedure15 for determining halogens in organic compounds uses an argentometric