Preparation of 1-bromobutane (n-Butyl Bromide) In a 250 mL round-bottomed flask, place 13.5 g (0.13 mol) of sodium bromide, 15 mL of water and 10 mL (0.11 mol) n-butyl alcohol. Cool the mixture in an ice bath and slowly add 12 mL of concentrated sulfuric acid in 2 ml portions, while swirling and cooling the flask. • Add a few boiling stones and attach the reflux condenser. Connect the gas trap (dilute NaOH) to the reflux condenser to absorb any escaping HBr gas (Figure 4, page 9). • Heat gently until boiling begins and then reflux for 30 minutes noting the formation of an upper layer of alkyl bromide. • Allow the mixture to cool and reassemble the apparatus for simple distillation. Distil the mixture into an ice-cooled flask until no more waterinsoluble droplets come over. At this stage the temperature reaches 110- 15 °C. • Transfer the distillate to a 100 mL separatory funnel, add about 15 mL water, stopper and shake. Drain the lower layer of butyl bromide into a flask and discard the upper aqueous layer.

Preparation of 1-bromobutane (n-Butyl Bromide) In a 250 mL round-bottomed flask, place 13.5 g (0.13 mol) of sodium bromide, 15 mL of water and 10 mL (0.11 mol) n-butyl alcohol. Cool the mixture in an ice bath and slowly add 12 mL of concentrated sulfuric acid in 2 ml portions, while swirling and cooling the flask. • Add a few boiling stones and attach the reflux condenser. Connect the gas trap (dilute NaOH) to the reflux condenser to absorb any escaping HBr gas (Figure 4, page 9). • Heat gently until boiling begins and then reflux for 30 minutes noting the formation of an upper layer of alkyl bromide. • Allow the mixture to cool and reassemble the apparatus for simple distillation. Distil the mixture into an ice-cooled flask until no more waterinsoluble droplets come over. At this stage the temperature reaches 110- 15 °C. • Transfer the distillate to a 100 mL separatory funnel, add about 15 mL water, stopper and shake. Drain the lower layer of butyl bromide into a flask and discard the upper aqueous layer.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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