Textbook Question
This reaction was monitored as a function of time: A → B + C A plot of ln[A] versus time yields a straight line with slope -0.0045/s. d. If the initial concentration of A is 0.250 M, what is the concentration after 225 s?
15. Chemical Kinetics
Half-Life
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In the reaction 3 BrO-(aq) → BrO3-(aq) + 2 Br-(aq), a plot of 1/[BrO-] vs. time is linear with a slope of 0. What does this indicate about the order of the reaction with respect to BrO-?
A
First order
B
Third order
C
Second order
D
Zero order
Verified step by step guidance1
Understand that the reaction order can be determined by analyzing how the concentration of a reactant changes over time.
Recognize that a plot of 1/[BrO-] vs. time is used to determine the order of a reaction. If this plot is linear, it suggests a specific order.
Recall that for a zero-order reaction, the concentration of the reactant decreases linearly with time, meaning [A] vs. time is linear.
For a first-order reaction, a plot of ln[A] vs. time is linear, and for a second-order reaction, a plot of 1/[A] vs. time is linear.
Since the plot of 1/[BrO-] vs. time is linear with a slope of 0, it indicates that the reaction is zero order with respect to BrO-, as the concentration does not change over time.
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