Question

meso-stilbene dibromide when 0.90 g of E-stilbene are reacted 6.(4) Calculate the theoretical yield of meso-stilbene dibromide when 0.90 with excess bromine. 70) Write the structure of the product obtained when cyclohexene is used to decolorize bromine. containing solutions. Br Bra

Answer 1

Ans 6(4)

The balanced reaction

E-stilbene + Bromine = meso-stilbene dibromide

C14H12 + Br2 = C14H12Br2

Mass of E-stilbene = 0.90 g

Molecular weight of E-stilbene = 180.24 g/mol

Moles of E-stilbene = mass/molecular weight

= (0.90 g) / (180.24 g/mol)

= 0.004993 mol

From the stoichiometry of the reaction

1 mol E-stilbene produces = 1 mol meso-stilbene dibromide

Moles of meso-stilbene dibromide = 0.004993 mol

Theoretical yield of meso-stilbene dibromide

= moles x molecular weight

= 0.004993 mol x 340.05 g/mol

= 1.697 g