
Concept explainers
a)
Interpretation:
A reaction that leads to the formation of triglyceride, starting with glycerol and carboxylic acids has to be suggested.
Concept introduction:
Ester formation reaction: Reaction of alcohol and
a)

Explanation of Solution
The hydroxyl group act as nucleophile and the carboxylic group act as electrophile in presence of acid catalyst; the nucleophile attack at electrophilic carbon of carboxylic acid leads to the formation of ester with the elimination of water molecule.
Mechanism of condensation reaction:
As shown above, the successive steps lead to the formation of triglycerides containing three ester group with the elimination of three water molecules.
b)
Interpretation:
An equation for the base hydrolysis of ester has to be written.
Concept introduction:
Ester formation reaction: Reaction of alcohol and carboxylic acid using acid catalyst results the ester formation with the elimination of water molecule.
b)

Explanation of Solution
The hydroxyl group acts as nucleophile and the carbonyl carbon act as electrophile; the nucleophile attack at electrophilic carbon of ester leads to the formation of alcohol with the elimination of fatty acid salts (soap).
Base hydrolysis of Esters:
c)
Interpretation:
Difference between fats and oils has to be explained.
Concept introduction:
Melting point: At temperature begins the solid to melt.
Unsaturation bonds: The presence of double or triple bonds in the molecules.
c)

Explanation of Solution
The presence of unsaturated bonds in the molecules tight close packing will be less due to bend of double bonds and the intermolecular attraction between them is less and less energy is required to overcome the interaction. More the double bonds lower the intermolecular interaction. Hence, the melting point decreases.
d)
Interpretation:
Reagent and catalyst used in hydrogenation process has to be identified.
Concept introduction:
Hydrogenation of
Homogeneous catalyst: Catalyst used is in same phase as the reactants.
Heterogeneous catalyst: Catalyst used is in different phase as the reactants.
d)

Explanation of Solution
Liquid oil is obtained from plants, having double bonds the presence of reactive double bond is converted into single bonds in order to solidify. Hydrogenation of double bonds is the process in which hydrogen molecule is added across the double bond forming alkane product. The alkane is highly facilitated for close packing and solidifies the oil.
Reaction carried out is hydrogenation reaction; hydrogen molecule is the reagent used in presence of either heterogeneous or homogeneous catalyst.
e)
Interpretation:
Iodine number has to be calculated.
Concept introduction:
Iodine number: number of grams of Iodine that react with given quantity of oil is called Iodine number.
Number of moles = Molarity
e)

Explanation of Solution
Given: molarity of
Number of moles of
The mol ratio between
Number of grams of
The iodine number is the number of grams of iodine that reacts with 100 g of corn oil.
Hence, Iodine number calculated is 123
Want to see more full solutions like this?
Chapter 11 Solutions
General Chemistry
- The bromination of anisole is an extremely fast reaction. Complete the resonance structures of the intermediate arenium cation for the reaction (Part 1), and then answer the question that follows (Part 2).arrow_forwardDrawing of 3-fluro-2methylphenolarrow_forwardWhich compound(s) will be fully deprotonated (>99%) by reaction with one molar equivalent of sodium hydroxide? I, II, III I, || I, III I only II, III SH | H3C-C=C-H || III NH2arrow_forward
- Will NBS (and heat or light) work for this reaction, or do we have to use Br2?arrow_forwardHAND DRAWarrow_forwardPredict the major products of the following organic reaction: Some important notes: Δ CN ? • Draw the major product, or products, of the reaction in the drawing area below. • If there aren't any products, because no reaction will take place, check the box below the drawing area instead. Be sure to use wedge and dash bonds when necessary, for example to distinguish between major products that are enantiomers. ONO reaction. Click and drag to start drawing a structure.arrow_forward
- The following product was made from diethyl ketone and what other reagent(s)? £ HO 10 2-pentyne 1-butyne and NaNH2 ☐ 1-propanol ☐ pyridine butanal ☐ pentanoatearrow_forwardWhich pair of reagents will form the given product? OH X + Y a. CH3 b. CH2CH3 ༧་་ C. CH3- CH2CH3 d.o6.(རི॰ e. CH3 OCH2CH3 -MgBr f. CH3-MgBr g. CH3CH2-MgBr -C-CH3 CH2CH3arrow_forwardQuestion 3 What best describes the product of the following reaction? 1. CH3CH2MgBr (2 eq) 2. H a new stereocenter will not be formed a new stereocenter will be formed an alkyl halide will result an alkane will result an aromatic compound will result 1 ptsarrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY





