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CHE 107 ch. 13

exam material

QuestionAnswer
rate change in concentration/change in time rate=k[A]^n
rate law relatrate of reaction and concentration of reactants
rate constant a constant of proportionality in the rate law *constant of proportionality in the rate law
intergated rate law concentration and time
integrated rate law 0 [A]t=-kt+[A]0
integrated rate law 1 ln[A]t=-kt+ln[A]0
integrated rate law 2 1/[A]t=kt+1/[A]0
half-life 0 1/k*[A]0/2
half-life 1 0.693/k
half-life 2 1/k*1/[A]0
[A]t vs. time slope=-k zero order straght line
ln[A]t vs. time slope=-k first order straight line
1/[A]t vs. time slope=k second order straight line
Arrhenius Equation k=Ae^-Ea/RT 8.314J/mol*K
Increase rate of reaction=? temperature number of collisions(orientation&energy)
Arrhenius plot y=mx+b lnk=-Ea/R*(1/T)+lnA lnk2/k1=Ea/R*(1/T1-1/T2)
rate law based on mechanism powers of rate law based on coefficients -only for elementary steps on mechanism
expressing reaction rate use ooefficient change in concentration change intime
determining the order and rate constant M/s, 1/s, 1/Ms
reaction mechanism problems sum to over reaction. match? write rate law based on slow step rate forward(k1)=rate backward(k-1) then substitute
Created by: hopesomang
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