EBK GENERAL, ORGANIC, & BIOLOGICAL CHEM
3rd Edition
ISBN: 9781259298424
Author: SMITH
Publisher: VST
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Textbook Question
Chapter 18.4, Problem 18.9P
Decaffeinated coffee is produced by extracting the caffeine from coffee with a solvent. Initially dichloromethane
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A 1 mL sample of glycogen was calculated to contain 21 µmol (micromole) glucose. To 1 mL of this sample was added 2 mL of 2 M HCl. It was then hydrolysed by boiling the solution for 15 minutes. After boiling the hydrolysate was cooled and made up with H2O to a final volume of exactly 10 mL. The glucose was measured in this solution and found to have a concentration of 340 µg/mL (microgram/milliliter).
i) Calculate the mass (mg) of glucose in the 10 mL of hydrolysate. As the 1 mL of glycogen sample was made up to a final volume of 10 mL, this mass of glucose was produced by the hydrolysis of the original 1 mL glycogen sample.
ii) Calculate the amount (µmol) of glucose produced by the hydrolysis of the glycogen sample.
iii) Calculate the purity of the glycogen used in the sample as
% Purity = (moles of measured glucose/ moles of calculated glucose in glycogen) *100
iv) state your answer in a complete sentence.
Show your working out such that the marker can easily understand it.…
Why cannot oils and water-soluble products be mixed and heated together?
Why should heating be at approximately 70 to 75 deg. C.?
A 1 mL sample of glycogen was calculated to contain 35 µmol (micromole) glucose. To 1 mL of this sample was added 2 mL of 2 M HCL. It was then hydrolysed by boiling the solution for 15 minutes. After boiling the hydrolysate was cooled and made up with H2O to a final volume of exactly 10 mL. The glucose was measured in this solution and found to have a concentration of 570 µg/mL (microgram/milliliter).
i) Calculate the mass (mg) of glucose in the 10 mL of hydrolysate. As the 1mL of glycogen sample was made up to a final volume of 10 mL, this mass of glucose was produced by the hydrolysis of the original 1 mL glycogen sample.
ii) Calculate the amount (µmol) of glucose produced by the hydrolysis of the glycogen sample.
iii) Calculate the purity of the glycogen used in the sample as
% Purity = (moles of measured glucose/ moles of calculated glucose in glycogen) *100
iv) state your answer in a complete sentence.
Chapter 18 Solutions
EBK GENERAL, ORGANIC, & BIOLOGICAL CHEM
Ch. 18.1 - Prob. 18.1PCh. 18.1 - Prob. 18.2PCh. 18.1 - Prob. 18.3PCh. 18.1 - Prob. 18.4PCh. 18.2 - Prob. 18.5PCh. 18.2 - Prob. 18.6PCh. 18.2 - Prob. 18.7PCh. 18.3 - Prob. 18.8PCh. 18.4 - Decaffeinated coffee is produced by extracting the...Ch. 18.4 - Prob. 18.10P
Ch. 18.5 - Prob. 18.11PCh. 18.5 - Prob. 18.12PCh. 18.5 - Prob. 18.13PCh. 18.6 - Prob. 18.14PCh. 18.6 - Prob. 18.15PCh. 18.6 - Prob. 18.16PCh. 18.6 - Name each ammonium salt. a. ( CH3 NH3)+Cl b. [( CH...Ch. 18.6 - Prob. 18.18PCh. 18.6 - Prob. 18.19PCh. 18.7 - Prob. 18.20PCh. 18.7 - Prob. 18.21PCh. 18.8 - Prob. 18.22PCh. 18.8 - Prob. 18.23PCh. 18.8 - Prob. 18.24PCh. 18.9 - Prob. 18.25PCh. 18.9 - Prob. 18.26PCh. 18.9 - Prob. 18.27PCh. 18.10 - Prob. 18.28PCh. 18 - Prob. 18.29PCh. 18 - Prob. 18.30PCh. 18 - Prob. 18.31PCh. 18 - Prob. 18.32PCh. 18 - Prob. 18.33PCh. 18 - Prob. 18.34PCh. 18 - Prob. 18.35PCh. 18 - Prob. 18.36PCh. 18 - Prob. 18.37PCh. 18 - Prob. 18.38PCh. 18 - Give an acceptable name for each amine. a. b.Ch. 18 - Give an acceptable name for each amine. a. b.Ch. 18 - Give an acceptable name for each amine. a. b. c....Ch. 18 - Give an acceptable name for each amine. a. CH3(...Ch. 18 - Prob. 18.43PCh. 18 - Prob. 18.44PCh. 18 - Prob. 18.45PCh. 18 - Prob. 18.46PCh. 18 - Prob. 18.47PCh. 18 - Prob. 18.48PCh. 18 - Prob. 18.49PCh. 18 - Prob. 18.50PCh. 18 - Which compound in each pair has the higher boiling...Ch. 18 - Which compound in each pair has the higher boiling...Ch. 18 - Draw the hydrogen-bonding interactions that occur...Ch. 18 - Prob. 18.54PCh. 18 - Prob. 18.55PCh. 18 - Which compound has the higher water solubility:...Ch. 18 - Prob. 18.57PCh. 18 - Prob. 18.58PCh. 18 - Draw the products of each acid-base reaction. a....Ch. 18 - Draw the products of each acid-base reaction. a....Ch. 18 - Prob. 18.61PCh. 18 - Prob. 18.62PCh. 18 - What type of nitrogen heterocycle occurs in both...Ch. 18 - Only one of the N atoms in nicotine has a trigonal...Ch. 18 - Prob. 18.65PCh. 18 - Prob. 18.66PCh. 18 - Why are aqueous solutions of an alkaloid slightly...Ch. 18 - Prob. 18.68PCh. 18 - Prob. 18.69PCh. 18 - Explain why patients with Parkinson’s disease...Ch. 18 - Prob. 18.71PCh. 18 - Prob. 18.72PCh. 18 - Prob. 18.73PCh. 18 - Prob. 18.74PCh. 18 - Prob. 18.75PCh. 18 - Prob. 18.76PCh. 18 - Prob. 18.77PCh. 18 - Prob. 18.78PCh. 18 - Prob. 18.79PCh. 18 - Prob. 18.80PCh. 18 - Prob. 18.81PCh. 18 - Prob. 18.82PCh. 18 - Prob. 18.83PCh. 18 - Prob. 18.84PCh. 18 - Prob. 18.85PCh. 18 - Prob. 18.86PCh. 18 - Prob. 18.87PCh. 18 - Why do some antihistamines cause drowsiness while...Ch. 18 - Prob. 18.89PCh. 18 - Prob. 18.90PCh. 18 - Compare the structures of morphine and heroin....Ch. 18 - Prob. 18.92CP
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Solutions: Crash Course Chemistry #27; Author: Crash Course;https://www.youtube.com/watch?v=9h2f1Bjr0p4;License: Standard YouTube License, CC-BY