Transfer the bromine reagent in the hood. Using a plastic measuring spoon, trans

Question

Transfer the bromine reagent in the hood. Using a plastic measuring spoon, transfer one quarter of a teaspoonful of the bromine-alumina reagent into a tared vial. Use a funnel or a folded weighing paper to assist in the transfer. Cap the vial. Weigh the sample, and calculate the moles of bromine present^4. Some bromine may be lost during the transfer. Allow for this loss by using only 95% of an equivalent number of moles of the alkylbenzene5. Calculate the weight and volume of alkylbenzene needed. In the hood, transfer one quarter teaspoonful of alumina to a second vial using a second plastic spoon. Tare the vial and alumina. Use an Eppendorf pipet or a microliter syringe to measure the calculated volume (Step 5) of alkylbenzene; add it to the alumina, drop by drop. Determine the weight change. Stopper the vial and shake vigorously to form a uniform mixture. Pour the contents of the vial containing the alkylbenzene into the vial containing the bromine. Cap the vial and shake the reagents gently to mix. Loosen the cap to see if there has been a pressure build up. Shake intermittently for 15 minutes to complete the reaction.

Explanation / Answer

I think some steps are missing ..may be the weights of bromine and alkylbenzene are given in CHEMICALS REQUIRED then moles are calculated as wt /molwt for bromine same for alkyl benzene also, equivalent no of moles of bromine are taken for futhure procedure after step 6

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