C C C O H H H H H H H H C C O C H H H H H H H H or I II Ans CH 3 CH 2 CH 2 OH

C c c o h h h h h h h h c c o c h h h h h h h h or i

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CCCOHHHHHHHHCCOCHHHHHHHHorI                                                      IIAns:CH3CH2CH2OH has the higher boiling point since it is capable of intermolecular hydrogen bonding.188.Which of the compounds shown below would be expected to be moresoluble in water? Briefly explain your choice.CH3OCH3orCH3CH2OHAns:CH3CH2OH is more soluble in water since it can donate a hydrogen bond to water and accept a hydrogen bond from water. CH3OCH3can only accept a hydrogen bond from water.189.Sugars, an example of which is shown below, tend to be very soluble in water. Offer a brief explanation ofthe factors involved in making sugars water-soluble.CCCCOCCHHOHHOHOHHOHHOHHH(The lone pairs of electrons on the oxygen atoms have been removed for clarity)Ans:Favorable hydrogen bonding between the sugar and water readily occurs as both contain O–H groups capable of hydrogen bonding. 190.Describe how soaps function as cleaning agents.Ans:Soaps form clusters called micelles. The polar groups of the soaps form the surface of the micelleand hydrogen bond to the surrounding water. The interior of the micelle is composed of the nonpolar, hydrophobic portions of the soap molecules. Grease and dirt are nonpolar and have limited solubility in water. In soapy water however, grease and dirt will dissolve in the nonpolar interior of the soap micelles, which in turn are soluble in the water.
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