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17 Cards in this Set
- Front
- Back
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Chemical Kinetics |
How fast does a reaction proceed |
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Reaction speed |
Measured by the change in concentration in time |
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-reactant concentration -action of catalysts -temperature -surface area -nature of reactants |
Factors affecting rate (5) |
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Rates of reaction |
This can be determined by monitoring the change in concentration of either reactants or products as a function of time |
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-speed at which reactants disappear -speed at which the products appear |
2 ways of measuring rate |
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M/s (M=Molarity not meter) |
Most common units in chemical kinetics |
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Chemical Equilibrium |
Forward reverse chemical reactions occur simultaneously at the same rate or concentration of reactants & products |
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Le Chatelier’s Principle |
It states that if stress is placed on a system at equilibrium, it will cause a shift in a direction to overcome the stress |
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-change in concentration -change in pressure -change in temperature |
Factorsof stress according to Le Chatelier’s principle (3) |
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-Weak acids or bases -saturated solution of salt -complex Ion equilibria -gas and heterogenous equilibria -sparingly soluble salts and hydroxides |
Examples of reversible systems at equilibrium |
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M/s |
What unit on K if it's zero order? |
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1/s |
What unit on K if it's first order? |
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1/(m•s) |
What unit on K if it's second order? |
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Zero order |
If rate us only multiplied by 1 what is the order? |
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First order |
If rate us only multiplied by 2 what is the order? |
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Second order |
If rate us only multiplied by 4 what is the order? |
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Negative 1 order or -1 |
If rate us only multiplied by 1/2 what is the order? |
