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Aquatic Chemical Kinetics. Look at 3 levels of chemical change: Phenomenological or observational Measurement of reaction rates and interpretation of data in terms of rate laws based on mass action Mechanistic
Chemical Kinetics. How are chemical reaction rates determined and what factors affect these rates?. Objectives. To understand rates of reaction and the conditions affecting rates. To derive the rate equation, rate constant, and reaction order from experimental data.
Chemical Kinetics. The rate or speed of chemical reactions - experimental & graphical How to control or influence the rate - faster or slower The mechanism of the reaction - atomic/molecular level picture of how reactions occur (organic chem.). Investigating a Simple Reaction.
Chemical kinetics. The rate of a chemical reaction is dependent on:. reactant concentrations state of reactants (solid, liquid, powder, etc.) temperature (e.g., eggs cook faster at higher temperatures)
Chemical Kinetics. Basics Kinetics = the field of chemistry dealing with the rate of chemical reactions A collision must occur between reactants for a reaction to happen Factors Affecting Reaction Rates Physical State 2 Ag + (aq) + S 2 O 3 2- (aq) -------> Ag 2 S 2 O 3 (s)
Collision Theory of Reactions. Collision theory is simple - for a reaction to occur, particles must collide successfully!A successful collision has two components:particles must collide at the right geometryparticles must collide with enough energy (the Activation energy)Factors which influence
Chemical Kinetics. Unit 11. Chemical Kinetics. Chemical equations do not give us information on how fast a reaction goes from reactants to products. KINETICS : the study of reaction rates and their relation to the way the reaction proceeds, i.e. its mechanism