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3 cards from this section. Quick, good the night before a test.
What is the purpose of measuring the initial rate of a reaction?
Consider why we measure right at the beginning of the reaction.
If doubling the concentration of a reactant quadruples the rate, what is the order of that reaction with respect to that reactant?
Reflect on the relationship between concentration change and rate change.
What is the main purpose of the method of initial rates?
Think about the importance of knowing how each reactant affects rates.
In a rate law, what does the exponent on the concentration term represent?
Recall the general format of a rate law.
Given a reaction A + B ⟶ C, you determine that when the concentration of A is doubled, the initial rate doubles; when the concentration of B is doubled, the rate increases by a factor of eight. Deduce the rate law for this reaction.
Use the changes in rates to find each 'n' and 'm' separately.
A mixture of reactants produces a gas that accumulates in a flask. You measure that the initial rate of production is 0.1 mL/s for [A] = 0.1 M and [B] = 0.2 M. If you increase [A] to 0.2 M while keeping [B] constant and the rate increases to 0.4 mL/s, what is the order of reaction with respect to A?
Relate concentration changes directly to how the rate changes.
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