Which equation best describes the average rate for the reaction shown? A(aq)+ B(aq)→ C(aq)+ D(aq)
A)rate = [C][D]
[A][B]
B)rate = +Δ[B]/Δt
C)rate = -Δ[C]/Δt
D)rate = -Δ[A]/Δt
E)rate = [A][B]
[C][D]

Question

Quizplus · Accepted Answer

The rate of the reaction can be determined by measuring the change in concentration of any reactant or product over time. Therefore, the best equation to describe the average rate of this reaction is rate = -Δ[A]/Δt or rate = -Δ[B]/Δt, since the concentration of either A or B is decreasing as the reaction proceeds. The other options do not accurately describe the rate of the reaction.

Which Equation Best Describes the Average Rate for the Reaction