Started: Oct 16 at 6:08pm ents Quiz Instructions Make sure you have read the mat

Question

Started: Oct 16 at 6:08pm ents Quiz Instructions Make sure you have read the materials) descritbed on the module page before you take the quiz Have your materias with you when take the quiz. The quiz from a conceptual procedural and a safety point of view. We work with strong acids and bases as well as expenesive glasware An is open notes/book, three attempts and each attompt i 30 minutes, The purpose of the quiz is to prepare you for lib unprepared student is a safety hazard to themselves as wea as to their classmates. You have to pass the quit (7000%) to coretoba you have not passed the quiz before lab you will not be able to attend. You need to contatt Dr. Fishback as soon as pessible to dscuss your options. If you do not come to lab and do not have a plan with Dr. Fishback you wil get a zero for the lab There are sone Honderson-Hasselbach calculation problems, Make sure you have ALL the materials with you as wel as a calclator Think about the acid base questions as it is easy to get turned around. Double check your answers before suniting your quiz. Do not walt unti the last minute to tako the quit. Question 1 1 pts In this lab you are trying to separate three compounds hased on their acid base propertics tist anisole, ben.aoic acid and o-toluidine according to their properties base.netral, acid base, neutra O neveral base acid Nen DOLL

Explanation / Answer

1. anisole is neutral, benzoic acid is acidic o-toluidine is basic. (correct answer is option 3)

2. Both layers should be removed through bottom, answer is option 2 (bottom,bottom)

3. Diethyl ether, then organic layer will come up (its density is lower than water ). Option 1

4. False, due to polar nature carboxylic acids are slightly soluble in water.

5. Acis and 2 pH units below its pKa. Option 4 is the correct answer.

6. 6.45 Option 4 is the correct answer

pH = pKa + log [salt]/[acid] = 4.45 + log 1000/10 = 6.45

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