Part A A certain first-order reaction (A-→products) has a rate constant of 3.60x10-3s at 45 °C. How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration? Express your answer with the appropriate units. ble Hinle)
Part A A certain first-order reaction (A-→products) has a rate constant of 3.60x10-3s at 45 °C. How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration? Express your answer with the appropriate units. ble Hinle)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter12: Kinetics
Section: Chapter Questions
Problem 11E: In the PhET Reactions under Options. (a) Leave the Initial Temperature at the default setting....
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Question
![I Review | Constants | Periodic Table
The half-life of a reaction, t12, is the time it takes
for the reactant concentration [A to decrease by
half. For example, after one half-life the
concentration falls from the initial concentration
[A]o to [A]o/2, after a second half-life to [A]o/4:
after a third half-life to Alo /8, and so on. on.
Value
min
Submit
Part B
A certain second-order reaction (B→products) has a rate constant of 1.80x103 M-s-1 at 27°C and an
initial half-life of 246 s. What is the concentration of the reactant B after one half-life?
Express your answer with the appropriate units.
• View Available Hint(s)
HA
Value
M
國](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F370ea171-8bb9-4b07-85c5-04ae9f865ef9%2F2f3f1175-a18d-44ab-b3ec-e3693374b7d6%2Fvlsgjc_processed.jpeg&w=3840&q=75)
Transcribed Image Text:I Review | Constants | Periodic Table
The half-life of a reaction, t12, is the time it takes
for the reactant concentration [A to decrease by
half. For example, after one half-life the
concentration falls from the initial concentration
[A]o to [A]o/2, after a second half-life to [A]o/4:
after a third half-life to Alo /8, and so on. on.
Value
min
Submit
Part B
A certain second-order reaction (B→products) has a rate constant of 1.80x103 M-s-1 at 27°C and an
initial half-life of 246 s. What is the concentration of the reactant B after one half-life?
Express your answer with the appropriate units.
• View Available Hint(s)
HA
Value
M
國
![Review | Constants | Periodic Table
The half-life of a reaction, t1/2. is the time it takes
for the reactant concentration A to decrease by
half. For example, after one half-life the
concentration falls from the initial concentration
[A]o to [A]o/2, after a second half-life to [A]o/4;
after a third half-life to [Ao/8, and so on. on.
For a first-order reaction, the half-life is constant. It depends only on the rate constant k and not on the reactant
concentration. It is expressed as
0.693
t1/2
For a second-order reaction, the half-life depends on the rate constant and the concentration of the reactant and
so is expressed as
t1/2 =
Part A
A certain first-order reaction (A→products) has a rate constant of 3.60x103s at 45 °C. How many
minutes does it take for the concentration of the reactant, A, to drop to 6.25% of the original concentration?
Express your answer with the appropriate units.
> View Available Hint(s)
HA
Value
min](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F370ea171-8bb9-4b07-85c5-04ae9f865ef9%2F2f3f1175-a18d-44ab-b3ec-e3693374b7d6%2Flqxj0ai_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Review | Constants | Periodic Table
The half-life of a reaction, t1/2. is the time it takes
for the reactant concentration A to decrease by
half. For example, after one half-life the
concentration falls from the initial concentration
[A]o to [A]o/2, after a second half-life to [A]o/4;
after a third half-life to [Ao/8, and so on. on.
For a first-order reaction, the half-life is constant. It depends only on the rate constant k and not on the reactant
concentration. It is expressed as
0.693
t1/2
For a second-order reaction, the half-life depends on the rate constant and the concentration of the reactant and
so is expressed as
t1/2 =
Part A
A certain first-order reaction (A→products) has a rate constant of 3.60x103s at 45 °C. How many
minutes does it take for the concentration of the reactant, A, to drop to 6.25% of the original concentration?
Express your answer with the appropriate units.
> View Available Hint(s)
HA
Value
min
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