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7 Cards in this Set

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Rate of Reaction

The change in concentration of a reactant or product per unit time, measured using titrations, changes in volume or mass, or time taken for a precipitate to form.

Order

The power to which the concentration of the reactant is raised in the rate equation- overall order is the sum of these orders. Zero order means the concentration has no effect on the rate, so it is not present in the rate equation.

Rate constant

K- the constant that links the rate of reaction with the concentrations of the reactants raised to their orders in the rate equation.

Half Life

The time taken for the concentration of a reactant to reduce by half- a first order reaction has a constant half life, as seen in a concentration time graph.

Reaction Mechanism

A series of steps that together make up the overall reaction.

Intermediate

A species formed in one step of a multi step reaction that is used up in a subsequent step and is not seen as either a reactant or product of the overall equation.

Rate determining step

The slowest step in the reaction mechanism. If a reactant appears in the rate equation it is involved in the rate determining step- and has the same stoichometry as well.