Concept explainers
(a)
Interpretation:
The skeletal structure of the given fatty acid should be drawn and cis-double bond is to be indicated.
Concept Introduction:
Fatty acids are long-chain
Unsaturated fatty acids can be defined as the long-chain fatty acids which have a long hydrocarbon chain with −COOH group. In unsaturated fatty acids, the carbon chain must have at least one double bond.
Answer to Problem 33P
Explanation of Solution
Given:
Fatty acids are long-chain carboxylic acids, which consist of two parts; long hydrocarbon chains and polar −COOH group. The long hydrocarbon chain consists of carbon and H atoms, so it has C-C and C-H bonds only, whereas, the polar −COOH group has polar C=O and C-O bonds. The unsaturated fatty acids have cis and trans-double bonds in the hydrocarbon chain.
In the ball-and-stick model, the red ball represents O atom, black ball represents C atom and white ball represents H atoms. Thus, the skeletal structure is:
(b)
Interpretation:
The omega-n designation for the
Concept Introduction:
Fatty acids are long-chain carboxylic acid, which may or may not have unsaturation in the molecule. They react with glycerol to form triglycerides. The reaction is called esterification as a carboxylic acid group reacts with the alcoholic group to form an ester group.
Unsaturated fatty acids can be defined as the long-chain fatty acids which have a long hydrocarbon chain with −COOH group. In unsaturated fatty acids, the carbon chain must have at least one double bond.
Answer to Problem 33P
The
Explanation of Solution
Fatty acids are long-chain carboxylic acids, which consist of two parts; long hydrocarbon chains and polar −COOH group. If there is at least one double bond in the long hydrocarbon chain of the fatty acid it is said to be an unsaturated fatty acid.
The unsaturated fatty acids can also classify as omega-n acids. Here, 'n' represents the position of the first
In the given fatty acid, the first
(c)
Interpretation:
The stereoisomer of the
Concept Introduction:
Fatty acids are long-chain carboxylic acid, which may or may not have unsaturation in the molecule. They react with glycerol to form triglycerides. The reaction is called esterification as a carboxylic acid group reacts with the alcoholic group to form an ester group.
Unsaturated fatty acids can be defined as the long-chain fatty acids which have a long hydrocarbon chain with −COOH group. In unsaturated fatty acids, the carbon chain must have at least one double bond.
Answer to Problem 33P
The stereoisomer of cis-fatty acid must be trans-isomer as given below;
Explanation of Solution
Fatty acids are long-chain carboxylic acids, which consist of two parts; long hydrocarbon chains and polar −COOH group. The double bond can arrange in two ways, i.e., cis and trans in the hydrocarbon chain of the fatty acid molecule. Hence, the stereoisomer of cis-fatty acid
(d)
Interpretation:
The structure of wax formed by the reaction of
Concept Introduction:
Fatty acids are long-chain carboxylic acid, which may or may not have unsaturation in the molecule. They react with glycerol to form triglycerides. The reaction is called esterification as a carboxylic acid group reacts with the alcoholic group to form an ester group.
Unsaturated fatty acids can be defined as the long-chain fatty acids which have a long hydrocarbon chain with −COOH group. In unsaturated fatty acids, the carbon chain must have at least one double bond.
Answer to Problem 33P
The skeleton formula of wax formed by the reaction of
Explanation of Solution
Fatty acids are long-chain carboxylic acids, which consist of two parts; long hydrocarbon chains and polar −COOH group. Waxes are a good example of hydrolyzable lipids, which are composed of fatty acid and higher alcohols. They have an ester
Hence, the reaction of
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Chapter 19 Solutions
General, Organic, and Biological Chemistry - 4th edition
- The structure of a fatty acid is shown below. HƠ a. Is this fatty acid most likely from a plant or animal source? b. How many carbon atoms are present? c. Is it a saturated or unsaturated fatty acid? If unsaturated what type? d. Is it most likely a solid or liquid at room temperature? e. Is it soluble in water?arrow_forwardb eing no 2. Palmitoleic acid is a fatty acid with the following condensed structural formula: O || CH3-(CH₂)5-CH=CH-(CH₂)7-C-OH a. How many carbon atoms are in palmitoleic acid? b. Is the fatty acid saturated, monounsaturated, or polyunsaturated? c. Is it most likely to be solid or liquid at room temperature?arrow_forwardWhich fatty acid would you expect to be have the lowest melting point? # 3 80 F3 71 $ 4 A) CH,CH=CH(CH,), CH=CHCOOH B) CH₂(CH₂),COOH C) CH₂(CH₂),COOH D) CH₂CH=CH(CH₂),COOH E) CH₂(CH₂) ₁4COOH Q F4 dº L % 5 Question 6 of 19 F5 14 <6 F6 & 7 ▷▷ F7 * 0 8 DII F8 9 DD F9 0 7 F10arrow_forward
- Partial hydrogenation can result in the formation of a. omega ω-3 fatty acids b. omega ω-6 fatty acids c. cis double bonds d. trans double bondsarrow_forward1. Assign a name to each of the following monosaccharides. Use D and L designations. H I CH 2OH C=O C=O a. b. a. HO-C-H H-C-OH H-C-OH CH₂OH d. True or False: b. HỌCH CH ₂OH C. Circle all chiral centers for the monosaccharides shown. The molecules shown can rotate plane polarized light?arrow_forwardDraw the skeletal ("line") structure of a saturated fatty acid with 8 carbons. Continue 143 Click and drag to start drawing a structure. D с с X S e ->>arrow_forward
- A fatty acid is a. They are naturally occurring dicarboxylic acid. b. Their carbon chains always contain at least two double bonds. c. They almost always contain an odd number of carbon atoms. O A. All three statements are true. B. Two of the three statements are true. O c. Only one of the statements is true. OD. None of the statements is true. 53arrow_forwardConsider erucic acid whose formula is CH3(CH2)7CH=CH(CH2)11COOH. It isa.Two of the choices are correctb.an omega-9 saturated fatty acidc.an omega-9 fatty acidd.an omega-7 unsaturated fatty acide.an unsaturated fatty acidarrow_forward9. Classify each of the following as a either saturated, monounsaturated or polyunsaturated fatty acids. a. CH3-(CH2)14-COOH b. CH3-(CH2)3-(CH=CH)3-(CH₂)5-COOH C. CH3-CH=CH-(CH2)13-COOHarrow_forward
- 3. Lipids a. What are saturated fats? b. What is the main origin of triacylglycerides or oils? O c. Why do unsaturated oils discolor bromine in solution? d. What functional groups are present in triacylglycerides? and. Why are lipids not soluble in water when they have a polar part? F. What positive function does cholesterol have in the body? pility: Good to go D (Ctrl)arrow_forwardTrans fats are most-correctly said to be: Select one: O a. Ketones with unsaturated, zigzag-shaped alkyl chains O b. Carboxylic acids with unsaturated, zigzag-shaped alkyl chains Esters with saturated, zigzag-shaped alkyl chains O d. Aldehydes with unsaturated, V-shaped alkyl chains O e. Carboxylic acids with unsaturated, V-shaped alkyl chains Previous page Quiz navigation Time left 1:28:31 OL O CE DELLarrow_forward16. Parts of the lipid below are labeled A and B. Which choice best describes part A and part B? Но. но H-C-N+C Но. CH2 НО онс-н ОН н ОН Part A Part B Polar lipid Polar lipid Nonpolar lipid Polar sugar Polar sugar onpolar sugar Polar sugar Polar sugar b. c. Polar lipid Nonpolar lipid d. e.arrow_forward
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