The rate of a chemical reaction depends on the concentrations of the reactants.
ID: 838440 • Letter: T
Question
The rate of a chemical reaction depends on the concentrations of the reactants. For the general reaction between Aand B,
aA+bB?cC+dD
The dependence of the reaction rate on the concentration of each reactant is given by the equation called the rate law:
rate=k[A]m[B]n
where k is a proportionality constant called the rate constant. The exponent m determines the reaction order with respect to A, and n determines the reaction order with respect to B. The overall reaction order equals the sum of the exponents (m+n).
For the reaction A+B+C?D+E, the initial reaction rate was measured for various initial concentrations of reactants. The following data were collected:
Trial [A](M) [B]
(M) [C]
(M) Initial rate
(M/s) 1 0.40 0.40 0.40 1.2
Explanation / Answer
from trail number 3 and 1 thechange is only in conc of A as the initial conc of A is doubled initial rate has become four times
therefore reaction order w.r.t A is 2
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