Question

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Section: U Date: 4 the reaction equation below. Note: consider the equilibriugarshown on p. 42 of manual Acetic Acid o meso stilbene tribromide Br pr HB pyridinium tribromide E-stilbene meso-stibene dibromide By ropa: 2. Complete the following table, using your actual measured amounts. Greyed-out cells do not need to be filled. mp (°C) 122- 125 bp MW vol mass ass mmol equiv (C) (g/mol) (ml) (mg) 180.25 E-stilbene 123 acetic acid (glacial) 118 ImL pyridinium tribromide 319.82 i loom ring meso-stilbene dibromide 236- 237 340.05 .618 06819 = 00630 3. Mass of product:.0639 Me map okproduct: A A

Answer 1

Solution:

Table :

A) Number of milimoles of E- stilbine

= (mass / molar mass)

= 0.058 mg   / 180.25 g mol-1

= 0.058 mg / 180.25 mg/mmol (1g/mol = 1 mg/mol)

= 0.00032 milimoles

>>> Equivalent = 1

Since, one equivalent of E-stilbene reacts with one mol of pyridinium tribromide in the reaction.

B) Pyrridinium tribromide:

Number of milimoles = Mass /Molar mass

= 100 mg / 319.82 g mol-1 = 100 mg / 319.82 mg/mmol

= 0.3126 milimoles

>> Equivalent = 1

C) Meso-stilbine dibromide:

Number of milimoles = mass/molar mass

= 0.0063 mg / 340.05 g /mol

= 0.0063 mg / 340.05 mg/mmol

= 1.85 x 10^-5 mmol