For the reaction A+B+CD+E, the initial reaction rate was measured for various in
ID: 939047 • Letter: F
Question
For the reaction A+B+CD+E, the initial reaction rate was measured for various initial concentrations of reactants. The following data were collected:
What is the value of the rate constant k for this reaction?
Express your answer to two significant figures and include the appropriate units. Indicate the multiplication of units explicitly either with a multiplication dot or a dash.
Trial [A](M) [B]
(M) [C]
(M) Initial rate
(M/s) 1 0.50 0.50 0.50 1.5×104 2 0.50 0.50 1.50 4.5×104 3 1.00 0.50 0.50 6.0×104 4 1.00 1.00 0.50 6.0×104
Explanation / Answer
order w.r.t C = 1
(1.5*10^(-4)/(4.5*10^(-4))) = (0.5/1.5)^n
n = 1
order w.r.t B = 0
(6.0*10^(-4)/(6.0*10^(-4))) = (0.5/1.0)^n
n = 0
order w.r.t A = 2
(1.5*10^(-4)/(6.0*10^(-4))) = (0.5/1.0)^n
n = 2
RATE = k[A]^2[B]^0[C]^1
(1.5*10^(-4)) = k(0.5^2*0.5^0*0.5^1)
k = 0.0012 M-2.s-1
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