Chemical Kinetics The Study of Reaction Rates. What is a Rate?

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Presentation transcript:

Chemical Kinetics The Study of Reaction Rates

What is a Rate?

The Rate of a Chemical Reaction In a chemical reaction, we can define “progress” as the consumption of a reactant or the formation of a product. To measure this progress, we measure how much a reactant concentration decreases in a given period of time, or how much a product concentration increases in a given period of time.

The Rate of a Chemical Reaction But not everything in a chemical reaction is changing at the same rate. 2A(g) + 3B(g)  C(g) + 4D(g) Suppose the concentration of substance A is decreasing at the rate of 0.40 mol/ L s. What is happening to the other concentrations?

The Rate of a Chemical Reaction

Standardizing the Rate of a Chemical Reaction

Reaction Rate from Concentration Measurements TIME (Seconds)[H 2 O 2 ]