
(a)
Interpretation:
From the given information the following has to be determined.
- (a) The order of the reaction has to be calculated.
Concept introduction:
Order of a reaction: The sum of exponents of the concentrations in the rate law for the reaction is said to be order of a reaction.
Rate law: It is an equation that related to the
- Depends on order of the
chemical reaction , the rate law or rate equation also varies.
(a)

Answer to Problem 19.20QP
The order of the reaction is third order
Explanation of Solution
To determine the order of the reaction
From the given information, experiments 2 and 5 denotes that when you double the concentration of
Let us take the ratio of these two rates,
Or,
From the given information, experiments 2 and 4 denotes that doubling
Let us take the ratio of these two rates,
Or,
Hence, form the rate law
Therefore the order of the reaction is third order.
(b)
Interpretation:
From the given information the following has to be determined.
- (b) The order of the reaction has to be calculated.
- (c) The initial rate of disappearance has to be calculated.
Concept introduction:
Order of a reaction: The sum of exponents of the concentrations in the rate law for the reaction is said to be order of a reaction.
Rate law: It is an equation that related to the rate of reaction to the concentrations or pressures of substrates (reactants). It is also said to be as rate equation.
- Depends on order of the chemical reaction, the rate law or rate equation also varies.
(b)

Answer to Problem 19.20QP
The initial rate of disappearance is
Explanation of Solution
To determine the initial rate of disappearance
From the given data, the rate constant k is calculated by rearranging the rate law.
Finally, by substituting the corresponding values in rate law and then by doing some mathematical calculation we get final answer
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Chapter 19 Solutions
Chemistry Atoms First, Second Edition
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