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3 cards from this section. Quick, good the night before a test.
What is a rate expression?
Think about how we express rates in chemical reactions.
Define the rate constant (k).
Focus on what k signifies in a rate expression.
What does the order of a reaction indicate?
Consider how changing reactant levels can change the outcome.
True or False: The rate constant, k, is the same for all reactions.
Remember, k is specific to a reaction at a set temperature.
A reaction follows the rate law Rate = k [D]² [E]³. If the concentration of D is increased from 0.1 M to 0.2 M and the concentration of E is kept constant at 0.1 M, by what factor does the rate change?
Consider the order of D in the rate law and how it affects the rate.
You are given an experimental rate constant of k = 0.5 mol⁻² dm⁶ s⁻¹ for a reaction that has a first-order dependence on one reactant and second-order on another. If concentrations are [A]=0.5 and [B]=0.25, calculate the rate of reaction.
Substitute the known values into the rate expression.
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