This is a systhesis experiment. Synthesize 1-bromobutane from 1-butanol. I need

Question

This is a systhesis experiment. Synthesize 1-bromobutane from 1-butanol. I need help on question # 4, 6 and 7. Also 1-bromobutane should be on the bottom layer in the separatory funnel during extraction phase?

the mage r bences between the two. where as our CLEANUE Dump the distillation flask contents, prodact, aqueous wash fractions, sodiumh sulfate, and silver nitrate test solutions into their proper waste containers. Wash elassware and the stir bar with soap and water and return to their original locations PRELABORATORY PREPARATATION Prepare only one prelab report in the lab notebook for week 1 and week 2 with a tle, date, ete., as in the course syllabus For week I: also include the following (be sure to note the information) source of any literature 1. Write the balanced chemical reaction for the synthesis. Is this more likely be an Sul or Sh2 mechanism? Explain Write out the chosen mechanism. 2. Look up the density of 1-butanol, then calculate the theoretical yield of 1-bromobutane. 3. Look up the normal (1 atm) boiling point for 1-bromobutane, then determine its boiling point at the average atmospheric pressure found in Albuquerque (640 mmHig) by using the boiling point nomograph found in Figure 3-20 of your Techniques manual 4 Why cool the reaction flask while the acid is added? For week 2: also include the following (be sure to note the source of any literature information): 5. Predict whether 1-bromobutane should be the top or bottom layer in the separatory funnel during the extraction phase of this experiment. Why cool the sodium hydroxide solution before using it to wash the crude product? 7. Why do a silver nitrate test on 1-butanol? RSERVATIONS Record all observations and be sure to note any deviations from the experimental set-up and procedure in the lab notebook Page

Explanation / Answer

4. The addition of acid to the reaction mixture is exothermic that is why the cooling is required.

5.The density of 1-bromobutane is 1.27 g/ml, so it is heavier than water and will be at the bottom during the layer separation.

6.Otherwise there is a chance of warm or hot NaOH reacts with the product to reconvert in to 1-butanol

7. AgNO3 test is for detection chloride anion. If there is any free chloride ion present in the starting 1-butanol as contaminat then the product will impure and may contain some amount chlorobutane.

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