For the reaction: C₂H₄Br₂+ 3 KI → C₂H₄ + 2 KBr + KI₃, when the rate of reaction is 2.0 × 10^-5, what is the rate of disappearance of C₂H₄Br₂?

Question

Quizplus · Accepted Answer

The stoichiometry of the reaction shows that for every 1 mole of C₂H₄Br₂ that disappears, 3 moles of KI react. Therefore, the rate of disappearance of C₂H₄Br₂ is 3 times the rate of the reaction. Therefore, the rate of disappearance of C₂H₄Br₂ is (-2.0 × 10^-5) x 3 = -6.0 × 10^-5. Hence, the correct answer is B.

For the Reaction: C2H4Br2 + 3 KI → C2H4

For the Reaction: C₂H₄Br₂+ 3 KI → C₂H₄