The integrated rate laws for zero-, first-, and second-order reaction may be arranged such that they resemble the equation for a straight line, y=mx+by=mx+b.
Order | Integrated Rate Law | Graph | Slope |
0 | [A]=−kt+[A]0[A]=−kt+[A]0 | [A] vs. t[A] vs. t | −k−k |
1 | ln[A]=−kt+ln[A]0ln[A]=−kt+ln[A]0 | ln[A] vs. tln[A] vs. t | −k−k |
2 | 1[A]= kt+1[A]01[A]= kt+1[A]0 | 1[A] vs. t1[A] vs. t | kk |
A.) The reactant concentration in a zero-order reaction was 0.100 MM after 165 ss and 4.00×10−2 MM after 305 ss . What is the rate constant for this reaction?
Express your answer with the appropriate units. Indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash.
ANSWER:
k0thk0thk_0th = | 4.29×10−4 MsMs |
B.) What was the initial reactant concentration for the reaction described in Part A?
C.) The reactant concentration in a first-order reaction was 0.100 MM after 50.0 ss and 3.90×10−3 MM after 90.0 ss . What is the rate constant for this reaction?
Express your answer with the appropriate units. Indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash.
D.) The reactant concentration in a second-order reaction was 0.600 MM after 235 ss and 2.70×10−2 MM after 870 ss . What is the rate constant for this reaction?
Express your answer with the appropriate units. Indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash.
Ans.
a) 4.28×10^-3 mol.L^-1 s^-1
b) 2.93 × 10^-2 M
c) 0.081s^-1
d) 0.055 mol^-1.L.s^-1
The integrated rate laws for zero-, first-, and second-order reaction may be arranged such that they...
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