Chemistry Practice Problems Average Rate of Reaction Practice Problems Solution: An average reaction rate is calculated as the chan...

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Solution: An average reaction rate is calculated as the change in the concentration of reactants or products over a period of time in the course of the reaction. An instantaneous reaction rate is the rate at a particular moment in the reaction and is usually determined graphically. The reaction of compound A forming compound B was studied and the following data were collected: Time (s)                    [A] (M) 0.                               0.184 200.                           0.129 500.                           0.069  800.                           0.031 1200.                         0.019 1500.                         0.016 a. What is the average reaction rate between 0 s and 1500 s? b. What is the average reaction rate between 500 s and 1200 s? c. What is the instantaneous rate of the reaction at t = 800 s?

Problem

An average reaction rate is calculated as the change in the concentration of reactants or products over a period of time in the course of the reaction. An instantaneous reaction rate is the rate at a particular moment in the reaction and is usually determined graphically.

The reaction of compound A forming compound B was studied and the following data were collected:

Time (s)                    [A] (M)

0.                               0.184

200.                           0.129

500.                           0.069

800.                           0.031

1200.                         0.019

1500.                         0.016

a. What is the average reaction rate between 0 s and 1500 s?

b. What is the average reaction rate between 500 s and 1200 s?

c. What is the instantaneous rate of the reaction at t = 800 s?

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