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4 cards from this section. Quick, good the night before a test.
Define the order of a reaction.
Think about what the exponents represent in the rate expression.
What characterizes a zero-order reaction?
Consider whether changing reactant concentrations would affect the rate.
What does the order of a reaction indicate?
Look back at the relationship between exponents and concentration.
In a zero-order reaction, what happens when concentration changes?
Think about the definition of zero-order.
A chemical reaction is detected to be a first-order reaction with a rate constant of 0.5 s⁻¹. If the initial concentration of the reactant is 2.0 M, what will be the concentration after 2 seconds?
Don't forget to use the exponential decay formula for first-order reactions.
For a second-order reaction, if the rate constant is 0.1 M⁻¹s⁻¹ and the initial concentration of A is 0.5 M, what will be the concentration of A after 10 seconds?
You need to remember the formula for second-order integrated rate law.
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