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Dr. Jim Bloxton CHEM 1022 Spring 2008 OPTIONAL PRACTICE MIDTERM EXAM II Answer Key Note: This is optional practice material for Midterm Exam II for chapters 14, 16, 17, 18, 19 These are sample questions that may or may not be used on a midterm or final exam. Other questions that are not found on this sample midterm exam will be on the actual midterm exam. Learn the basic principles and then be prepared to apply the principles to problems that you have not seen before. This includes all material that was covered or contained in the Chem 1022 lecture text, lecture notes, lecture handouts, study guides, recitation notes, and recitation handouts. It is very important to review all practice and actual lecture quizzes, midterms, study guides and homework materials. Several other practice midterm exams could have been generated from these materials that would look very different from this practice midterm exam. Note: It is very important to remember that Chemistry is a cumulative topic and that the material that was covered in previous chapters needs to be reviewed as this material will continue to reappear in concepts that are needed to solve new problems. 1. Write the IUPAC name of the following compound: CH 3 CH 2 CH 2 CHCH 2 CHCH 3 2-methyl-4-heptanol | | OH CH 3 2. Is the compound in problem 1 a primary, secondary or tertiary alcohol? Explain. Secondary alcohol. The carbon that is bonded to the alcohol group is also directly bonded to 2 other carbon atoms. 3. How does hydrogen bonding affect the boiling points of alcohols? Explain with a drawing. Hydrogen bonding raises the boiling points of alcohols since more energy is required to break the intermolecular hydrogen bonds and cause the alcohol molecule to go from the liquid to the gas phase. A diagram was given in the midterm exam review session on the white board. Figure 14.3 on page 378 of the 8 th edition of the Chem 1022 lecture text also has a diagram. 4. Write a chemical equation with chemical structures for an alcohol that will react with an aqueous solution of potassium hydroxide to form a water soluble ionic compound. This alcohol must be a phenol type of alcohol. C 6 H 5 OH + KOH(aq) C 6 H 5 OK(aq) + H 2 O 1
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5. Complete the following chemical equation: (CH 3 CH 2 ) 2 CHOH + KMnO 4 + H 2 SO 4 (CH 3 CH 2 ) 2 C═O 6. What functional group is present in ethylene oxide? What is ethylene oxide used for? Epoxide is the functional group and epoxides are a type of ether.
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