Please, Provide me with Easy understanding Instructions to follow this lab proce
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Question
Please, Provide me with Easy understanding Instructions to follow this lab procedures. Please if you don't mind number the instruction steps.
Thanks, Glacial acetic acid is a pure grade of netic stir bar of then carefully 150 mmol of 17 of concentrate su or turn on roun a gl laci reac furie the a f the chips (~300 alcohol d to ng isopentyl boi in mL add 1.0 add mix hood, and Under weigh size a appropriate IOP-10l. and Accurately flask Reaction bottom acetic acid that freezes at about 17oC Connect d hea Take Care! Wear gloves; avoid con- while stirring or using one) an to with acetic acid and sulfuric the cooling water, start the stirrer (if you are after bo xture acid; do not breathe their vapors. tion mixture under reflux [OP-7cl for one hour action move the Observe and Note: Look for and Separation. When the reaction time is up, allow the re an re l, leav tory funne cool nearly to room temperature Turn cooling reflux condenser Transfer the mixture scpal ing the stir or boiling reaction lol orga chips behind, and wash he leave record any evidence of a chemical anic layer in the reaction Stop and Think: What is the density 50 mL of water. Drain the aqueous layer and aqueous after should be on top, the aqueous layer aratory 5% aqueous sodium bicarbonate, the until evolution of isopentyl acetate? Which layer portions of funnel. Then carefully wash the or the organic layer? each washing. During first stir the layers sodium Take care! Pressure may build up subsides before you the d anhydrous an stopper the separatory fun wi h n the stoppered separatory funnel Dry ICP-251 the crude isopentyl glassware IOP Waste Disposal Unless your instruc sulfate or magnesium sulfate. standard-taper Be sure the ther. tor directs otherwise, dissolve the Purification and Analysis. Using have your spent drying agent in the combined apparatus simple distillation E7, OP-30, and wash solvents and flush the mixture bulb is positioned as shown in Figure mometer instructor check your setup before you start. Distill the crude product, col Record the actual ng liquid that distills thermometer bulb is moist boiling range you observe: wait until the entire receiver, and the tem condensing vapors, liquid is dist ng into the reading. Stop down the drain Stop and Think: What does the boil perature is stable before you record the initial temperatur flask ng range of the distillate tell you the distillation when only a drop so of liquid remains in the boiling con or distillate is cloud or about the purity of your produc or when the temperature reaches If the in a tared Waste Disposal: Put any forerun and tains water droplets, dry it IOP-251. Weigh IOP-4l the distillate peak area any residue left in the boiling flask labeled vial. Using a Carbowax column or another suitable column,obtain nto a designated waste cont a gas chromatogram IOP of the distillate and measure the otherwise directed by your instructor. Unless your instructor indicates chro- assume that the components of the distillate appear on the gas and matogram in the order (1) isopentyl alcohol, (2) isopentyl acetate, Stop and Think Can you guess areas, calculate the percentage of each which peak corresponds to which (3) acetic acid. From the peak isopentyl component based on the peak component in the distillate, then calculate your percent yield of areas? acetate based on its percentage in the dist
Explanation / Answer
Here are the instructions:
Reaction
Separation:
Purification and Analysis:
1. Prepare a set-up for distillation using figure E7.
2. Distill the crude product when the temperature range is 136 oC and 143 oC.
3. Record the actual temperatures at each step. Wait till the temperature does not change anymore.
4. Stop heating when only a drop or so is remaining in the RB in set-up or when temperature reaches 143 oC.
5. Now, check for purity. Means if the distillate is cloudy, dry it using Na2SO4 or MgSO4.
6. Now, weigh the obtained product. This will be your yield.
7. Using a carbowax/another suitable column, you should obtain a gas chromatogram of the distillate.
8.Now, measure the peak areas in the chromatogram. 1st peak will be for isopentyl alcohol. 2nd peak will be for isopentyl acetate and 3rd will be for acetic acid.
9. Now, using the peak areas, calculate the % of each component in the distillate and calculate the % yield of isopentyl acetate using % in the distillate.
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