CHAPTER 1 rEvIEw K/u Knowledge/Understanding Knowledge For each question, select the best answer from the four alternatives. 1. Gasoline contains many structural isomers of octane. Which of the following is NOT a structural isomer of octane? (1.1) K/u (a) 3-methylheptane (b) 4-ethylheptane (c) 2,2,4-trimethylpentane (d) 2,2,3,3-tetramethylbutane 2. What is the major product of the hydration reaction of but-1-ene? (1.2) K/u (a) butan-1-al (c) butan-2-al (b) butan-1-ol (d) butan-2-ol 3. Which of the following statements best describes an aromatic organic compound? (1.3) K/u (a) an aldehyde or a ketone with a distinctive odour (b) an unsaturated compound containing a 6-carbon ring with 6 identical bonds (c) a compound containing a cyclic structure (d) a compound containing a cyclic structure with a double bond 4. Which of the following compounds is an ether? (1.4) K/u (a) O CH3CCH2CH3 O (b) CH3CH2CH2CH (c) OH CH3CHCH3 (d) CH3CH2CH2OCH3 5. Which of the following formulas represents propanone? (1.5) K/u (a) CH3CHO (b) CH3OCH3 (c) CH3COCH3 (d) CH3COOCH3 6. Which statement best describes the compound CH3(CH2)4CH w CHCH2CH w CH(CH2)7COOH? (1.6) K/u (a) It is a saturated fatty acid. (b) It is soluble in a polar solvent. (c) It is a long-chain alcohol. (d) It contains a carboxyl group. 72 Chapter 1 • Organic Compounds T/I Thinking/Investigation C Communication A Application 7. Which of the following compounds has the highest solubility in water? (1.6) K/u (a) CH3CH2CH w CHCH3 (b) O CH3CCHCH3 CH3 (c) CH3CH2CH2CH2C OH O (d) CH3CH2CH2CH2CH2OH 8. Choose the statement that best describes the compound in Figure 1. (1.6) K/u O CH3(CH2)7CH CH(CH2)7C O OCH2 CH3(CH2)7CH CH(CH2)7C O OCH CH3(CH2)7CH CH(CH2)7C OCH2 Figure 1 (a) an amide (b) a product of a saponiication reaction (c) a saturated fatty acid (d) a triglyceride 9. Predict which of the following compounds has the highest boiling point. (Assume that all have similar molecular masses.) (1.6) K/u (a) aldehyde (b) ketone (c) carboxylic acid (d) ester 10. Name the compound illustrated in Figure 2. (1.7) H CH3CH2 N K/u CH2CH2CH3 Figure 2 (a) (b) (c) (d) 2-aminopentane 2-nitropentane ethylpropylamide N-ethylpropan-1-amine NEL 11. Which two reactants could form the compound illustrated in Figure 3? (1.7) K/u Write a short answer to each question. O CH3 C N CH2CH3 CH3CHCH3 Figure 3 (a) (b) (c) (d) ethanoic acid and a secondary amine ethanoic acid and a primary amine ethanoic acid and a tertiary amine methanoic acid and a secondary amine Indicate whether each statement is true or false. If you think the statement is false, rewrite it to make it true. 12. Unsaturated hydrocarbons must contain at least one carbon‒carbon double or triple bond. (1.1) K/u 13. But-1-ene and but-2-ene are structural isomers of each other (1.1, 1.2) K/u 14. Markovnikov’s rule states that, in an addition reaction involving a hydrogen atom, the hydrogen atom will usually bond to the carbon atom with the fewest hydrogen atoms attached. (1.2) K/u 15. Aromatic compounds usually undergo addition reactions. (1.3) K/u 16. A compound that is a benzene ring with a hydroxyl group on one of the carbon atoms is called phenyl. (1.4) K/u 17. An ester is formed from the reaction of two alcohols. K/u 18. Aldehydes contain a carbonyl group on the terminal carbon atom. (1.5) K/u 19. A ketone can be oxidized to produce a primary alcohol. (1.5) K/u 20. Carboxylic acid molecules are much less polar than the corresponding alkane molecules. (1.6) 22. Write a balanced chemical equation to represent each of the following reactions. Use structural formulas or line diagrams in your equations. Classify each reaction as addition or substitution. (1.1, 1.2, 1.3) K/u (a) bromine reacting with pent-2-ene (b) bromine reacting with cyclopentene (c) bromine reacting with benzene 23. Draw a structural formula to represent each of the following organic compounds: (1.1, 1.3, 1.4, 1.5, 1.6) K/u C (a) ethan-1,2-diol (b) 1,3-dimethylbenzene (c) cyclohexanol (d) 1,2-dichloropropane (e) 2,2-dichloropropane (f) 2-methylbutanal (g) hexan-3-one (h) 2-ethoxypropane (i) aminoethanoic acid (j) 3,5-dimethylhexan-3-ol 24. List the non-alkyl functional groups in each of the compounds represented below. (1.1, 1.2, 1.3, 1.7) K/u (a) CH OH 3 CH3 O testosterone (hormone) O CH3 Match each condensed chemical formula on the left with the most appropriate term on the right. 21. (a) (b) (c) (d) (e) (f) (g) (h) NEL CH3CH w CH2 CH3COOCH3 CH3CH2CHO CH3CH2COOH CH3CHOHCH3 CH3CH2CH2OH CH3COCH3 CH3CH2OCH3 (i) (ii) (iii) (iv) (v) (vi) (vii) (viii) a ketone an ester propan-2-ol propanal an ether propan-1-ol propene propanoic acid (1.2, 1.4, 1.5, 1.6) CH3 (b) OH H3C ibuprofen (pain reliever) (c) NH2 CH3 amphetamine (stimulant) K/u Chapter 1 Review 73 25. Organic compounds are classiied by their functional groups. For each of the compounds listed below, identify the functional group(s), determine the type of compound, and write the correct IUPAC name. (1.4, 1.5, 1.6, 1.7) K/u C (a) CH3CH2CH2OH (b) CH3CH2COOH (c) CH3CH2CH2CH2CH2CHO (d) CH3CH2OCH2CH2CH3 (e) CH3NH2 (f) CH3COCH2CH2CH3 (g) O CH3COCH2CH2CH3 (h) CH3CH2CONHCH3 (i) CH3CHCCH2CH3 (j) H C O O OH 26. Draw structural formulas for each of the following organic compounds. Circle the non-alkyl functional group(s). (1.4, 1.5, 1.6, 1.7) K/u C (a) hexan-2-one (b) 2-methylpentanal (c) pentane-1,3-diol (d) buta-1,3-diene (e) 1-propoxybutane (f) 2-propoxybutane (g) ethyl ethanoate 27. Draw structural formulas (or line diagrams) and write names for the following isomers: (1.5, 1.6, 1.7) K/u C (a) three ketones with the molecular formula C5H10O (b) two esters with the formula C3H6O2 (c) a primary, a secondary, and a tertiary amine, with the formula C5H13N understanding 28. Can CH2CF2 exhibit hydrogen bonding? Explain. (1.1) K/u 29. If you were presented with the structural formulas for a variety of hydrocarbons, what features of the molecules would you look at to rank the hydrocarbons in order of increasing boiling point? Explain your answer. (1.1, 1.2) K/u 74 Chapter 1 • Organic Compounds 30. Draw a chemical equation to represent a reaction that could produce each of the following types of compounds. Use condensed structures in your equations. Name all reactants and products. (1.1, 1.2, 1.3) K/u (a) alkane (b) monohalogenated alkane (c) dihalogenated alkane (d) tetrahalogenated alkane (e) halogenated benzene (f) alkene 31. Starting with propane, list the sequence of reactions needed to produce propanone. (1.5) K/u 32. he following compounds all have similar molecular masses: ethanoic acid; ethanol; ethanal; ethane Order the compounds by increasing boiling point. Explain your decision. (1.1, 1.4, 1.5, 1.6) A 33. Explain why the following compounds do not exist: (1.2, 1.3, 1.4, 1.5, 1.6) K/u T/I (a) 2-chloro-2-butyne (b) 2-methyl-2-propanone (c) 1,1-dimethylbenzene (d) 2-pentanal (e) 3-hexanoic acid (f) 5,5-dibromo-1-cyclobutanol 34. Name and draw the structural formula for each of the following compounds: (1.2, 1.3, 1.4, 1.5, 1.6) K/u C (a) a secondary alcohol with the formula C4H10O (b) a tertiary alcohol with the formula C4H10O (c) an ether with the formula C4H10O (d) a ketone with the formula C4H8O (e) an aromatic compound with the formula C7H8 (f) an alkene with the formula C6H10 (g) an aldehyde with the formula C4H8O (h) a carboxylic acid with the formula C2H4O2 (i) an ester with the formula C2H4O2 35. Write a chemical equation for each of the following reactions. Use condensed formulas. Classify each reaction by type. (1.2, 1.4, 1.5, 1.6) K/u (a) ethene from ethanol (b) ethoxyethane from ethanol (c) propanal from an alcohol (d) a secondary pentanol from an alkene (e) ethanoic acid from an alcohol (f) ethyl methanoate from an acid and an alcohol NEL 36. Copy and complete Table 1 in your notebook. (1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7) T/I C Table 1 Name Condensed structure Line diagram or structural formula Type of compound 1-methoxybutane methanal 1,4-dichloropent-2-ene CH3 CH CH2 CH CH3 NH CH2 CH2 CH3 CH3 propanamide CH3CH2CH2CH2CH(OH)CH2CH3 O 3-methylhexanoic acid OH CH3 CH2 CH CH2 CH CH3 CH3 2-methylbutane CH3CH2CH(CH3)CH2CH3 O O OH methyl pentanoate NEL Chapter 1 Review 75 37. Predict which of the following pairs of compounds is more soluble in water. Give reasons for your answers. (1.3, 1.4, 1.5, 1.6) K/u T/I (a) COOH and (b) CH3COOH and CH3COOCH3 (c) ethanol and decanol (d) 2-butanol and butanone 38. Predict which compound in each of the following pairs has the higher boiling point. Provide a reason for each answer. (1.4, 1.5, 1.6) K/u (a) CH3CH2 O CH2CH3 and CH3CH2 C CH2CH3 O (b) O O CH3CH and CH3COH (c) CH3CH2OH and CH3CH2CH2CH2CH2OH 39. Give an example of a reaction that would yield the following products. For each reaction, name the organic reactant(s) and product(s). Remember to use (O) for oxidation reactions. (1.4, 1.5, 1.6) T/I (a) primary alcohol (e) ketone (b) secondary alcohol (f) carboxylic acid (c) tertiary alcohol (g) ester (d) aldehyde 40. Classify each reaction and name all the reactants and products. (Note that the equations are not balanced.) (1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7) K/u light (a) CH3CH3 1 Br2 h CH3CH2Br 1 HBr (b) CH3CHCH2 1 Cl2 h CH3CHClCH2Cl catalyst (c) C6H6 1 I2 h C6H5I 1 HI (d) CH3CH2CH2CH2Cl 1 OH2 S CH3CH2CH2CH2OH 1 Cl2 (e) CH3CH2COOH 1 CH3OH S C2H5COOCH3 1 H2O S (f) CH3CH2OH CH2CH2 1 H2O (g) C6H5CH3 1 O2 S CO2 1 H2O (h) CH3CHO 1 3 O 4 S CH3COOH (i) NH3 1 C4H9COOH S C4H9CONH2 1 H2O (j) CH3I 1 NH3 S CH3NH2 1 HI 76 41. For each of the descriptions, write a balanced chemical equation using condensed formulas. (1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7) K/u (a) a substitution reaction of propane involving chlorine (b) a halogenation reaction of benzene involving luorine (c) the complete combustion of ethanol (d) a dehydration reaction of butan-2-ol (e) the controlled oxidation of butanal (f) the preparation of pentan-2-one from an alcohol (g) the preparation of hexyl ethanoate from an acid and an alcohol (h) the hydrolysis of methyl pentanoate (i) the controlled oxidation of propan-1-ol (j) an addition reaction of an alkene to produce an alcohol (k) a condensation reaction of an amine Chapter 1 • Organic Compounds Analysis and Application 42. Describe a procedure that could be used to separate a mixture of alcohols containing methanol, ethanol, and hexan-1-ol? Explain why this procedure would work. (1.4) A 43. Analysis of an unknown organic compound gives the empirical formula C5H12O. It is only slightly soluble in water. When this compound is oxidized in a controlled way with potassium permanganate, KMnO4(aq), it is converted into a compound that has the empirical formula C5H10O. his second compound has the properties of a ketone. Based on the information provided, write the condensed formulas and names for all possible isomers of the unknown compound. If possible, give reasons why one or more of the isomers is more or less likely to be the unknown organic compound. (1.5) C A 44. Draw a low chart outlining a procedure to synthesize the ester ethyl ethanoate, starting from ethene. (1.6) T/I C A 45. Create a table with the following headings: Type of organic compound; Functional group; Physical properties; Chemical reactions; Important uses. Complete your table summarizing all you have learned about the organic compounds discussed in this chapter. (1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7) K/u C A 46. Create a graphic organizer to show how organic compounds are related and what reactions convert one to another. (1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7) K/u C A NEL Evaluation 47. Figure 4 shows the structural formulas of glucose, propane-1,2,3-triol (glycerol), and ethane-1,2-diol (ethylene glycol). All three compounds have a sweet taste. (1.4) A H CH2OH H HO O H C OH H C OH H C OH H H OH H H OH OH H glucose propane-1,2,3-triol (glycerol) HO H H C C H H OH ethane-1,2-diol (ethylene glycol) Figure 4 (a) Predict their relative melting points and boiling points. Give reasons for your answer. (b) Predict the solubility of each of these compounds in water and in gasoline. Give reasons for your answer. (c) Ethane-1,2-diol (ethylene glycol) is toxic and is used as antifreeze in automobile radiators. Suggest an explanation for the toxicity of antifreeze. (d) A hypothesis has been proposed that taste receptors respond to functional groups in the compounds that make up our food. Do the structures of these three compounds support that hypothesis? Explain. 48. Natural products are made by the cells of living organisms. Synthetic products are made by a laboratory process. he product may be exactly the same compound, but a distinction is made based on the source. For example, when bananas are dissolved in a solvent and the lavouring extracted, the pentyl ethanoate obtained is labelled “natural lavour.” When pentyl ethanoate is synthesized by esteriication of ethanoic acid and pentanol, it is labelled “artiicial lavour.” (1.6) T/I A (a) Are substances such as artiicial vanilla lavouring and vanilla extracted from a vanilla bean identical? Why or why not? (b) In your opinion, should food companies be required to distinguish between a “natural” lavouring and an “artiicial” lavouring on a food product label? Explain your position. NEL (c) Design a method for determining whether people can tell the diference between synthetic vanilla and natural vanilla and, if they can, which they prefer. relect on your Learning 49. Write a summary of what you have learned about organic chemistry in Chapter 1. K/u A 50. What are some typical errors made when naming organic compounds? How can you avoid those errors? K/u A 51. What concepts in this chapter did you struggle the most with? Describe three ways you can help improve your understanding of these concepts. K/u T/I 52. How would you explain to a friend why it is important to understand organic chemistry to make informed decisions in everyday life? A research WEB LINK 53. Acetylsalicylic acid (ASA), better known as Aspirin, is a common pain reliever. Research the following topics and summarize your indings into a short paper, a concept map, or some other method of communication: T/I C A • Explore the chemical reactions associated with the synthesis of ASA. Determine the type of reaction that occurs, and the class of organic compounds involved. • Research the historical connection between willow bark and ASA. What advantages does ASA have over the compound extracted from willow bark? How were these advantages achieved? 54. Organic compounds are present in a huge variety of everyday substances. Examine the ingredient lists for some foods, beverages, or other products you use daily. Identify at least ive examples of compounds whose names indicate that they are organic compounds. Research the chemical structures of these compounds, how they are produced, and what their functions are in the products you chose. Share your indings in a poster or electronic slide show. T/I C A 55. Gasoline is a mixture of many organic compounds. Research the structures of at least 4 of these compounds. Find out what the “octane rating” of gasoline means. Why do car manufacturers recommend using fuel with diferent octane ratings for diferent vehicles? What might happen if you use the wrong kind? Summarize your indings into an infomercial or poster to be displayed at a gas station. T/I C A Chapter 1 Review 77