A teacher told a learner to react benzene (CH) with chlorine (Cl₂) to
produce 100 g of chlorobenzene. The expected yield is no higher than
65%. Calculate the minimum quantity of benzene that
of chlorobenzene if the yield is 65%. The equation
CH₂ + Cl₂ → CH₂Cl + HCl
produces 100 g
is:
for the reaction

Question

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Respuesta :

Eduard22sly Eduard22sly · Answer 1 · 2022-08-26T13:57:59+02:00

The minimum quantity of benzene, C₆H₆ needed for the reaction is 106.67 g

From the question given, the following data were obtained

Percentage yield = (Actual / Theoretical) × 100

65% = 100 / Theoretical

0.65 = Actual / Theoretical

Cross multiply

0.65 × Theoretical = 100

Divide both sides by 0.65

Theoretical = 100 / 0.65

Theoretical yield = 153.85 g

Balanced equation

C₆H₆ + Cl₂ → C₆H₅Cl + HCl

Molar mass of C₆H₆ = 78 g/mol

Mass of C₆H₆ from the balanced equation = 1 × 78 = 78 g

Molar mass of C₆H₅Cl = 112.5 g

Mass of C₆H₅Cl from the balanced equation = 1 × 112.5 = 112.5 g

SUMMARY

From the balanced equation above,

112.5 g of C₆H₅Cl were obtained from 78 g of C₆H₆

Therefore,

153.85 g of C₆H₅Cl will be produced from = (153.85 × 78) / 112.5 = 106.67 g of C₆H₆

Thus, the minimum amount of benzene, C₆H₆ needed for the reaction is 106.67 g

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