Chemical Kinetics Slides and Notes - Chap 18 Chemical Kinetics Powdered chalk(mostly calcium carbonate CaCO3 reacts rapidly with dilute hydrochloric

Chemical Kinetics Slides and Notes - Chap 18 Chemical...

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Chap. 18: Chemical Kinetics Powdered chalk (mostly calcium carbonate CaCO 3 ) reacts rapidly with dilute hydrochloric acid because it has a large total surface area. A stick of chalk has a much smaller surface area, so it reacts more slowly. Reaction: CaCO 3 + HCl CaCl 2 + H 2 O + CO 2
Kinetics vs. Equilibrium Kinetics concerns the rate at which reactions occur. Equilibrium related to the extent a reaction proceeds if sufficient time is allowed. Consider the reaction: Ratio of concentrations at equilibrium can be determined from Gibbs free energy change, or voltage of galvanic cell. More difficult to determine how reaction proceeds from initial conditions to equilibrium. 5 Fe 2 + ( aq ) + MnO 4 ( aq ) + 8 H 3 O + ( aq ) 5 Fe 3 + ( aq ) + Mn 2 + ( aq ) + 12 H 2 O( l )
Kinetics 2
Chemical Kinetics: Topics to be Covered

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