Term
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Definition
| the study of how fast chemical reactions occur |
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Term
| what are the 4 important factors which affect rates of reaction? |
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Definition
1) reactant concentration
2) temperature
3) physical state
4) action of catalysts |
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Term
| how is the speed of a reaction measured? |
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Definition
| by the change in concentration with time |
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Term
| the rate at any instant in time (instantaneous rate) is ______________ of the tangent to the curve. |
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Definition
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Term
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Definition
| the time taken for the concentration of a reactant to drop to half its original value |
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Term
| as temperature increases, rate ____________ |
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Definition
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Term
| what does the collision model state? |
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Definition
| in order for molecules to react they must collide |
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Term
| t/f: all collisions lead to products |
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Definition
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Term
| what do enzymes and catalysts do? |
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Definition
| help get the right molecule orientation |
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Term
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Definition
| molecules must possess a minimum amount of energy to react |
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Term
| what is activation energy? |
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Definition
| the minimum energy required to initiate a chemical reaction |
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Term
| t/f: a catalyst is used an regenerated |
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Definition
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Term
| a catalyst changes the _________ of a chemical reaction |
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Definition
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Term
| what are the 2 types of catalyst? |
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Definition
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Term
| catalysts _____________ the energy of activation |
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Definition
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Term
| mass number is the sum of: |
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Definition
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Term
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Definition
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Term
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Definition
| have the same number of protons and different numbers of neutrons |
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Term
| chemical equilibrium is the point at which: |
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Definition
| the concentrations of all species are constant |
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Term
| what is the basis of Le Chatelier's principle? |
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Definition
| upon pressure increase, the reaction will proceed towards the side with the fewest number of gaseous molecules |
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Term
| what is an amphoteric substance? |
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Definition
| one that can behave as an acid and a base |
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Term
| what is a conjugate base? |
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Definition
| whatever is left of an acid after it donates a proton |
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Term
| what is a conjugate acid? |
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Definition
| whatever is left of a base after it accepts a proton |
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Term
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Definition
| the amount of acid or base neutralized by the buffer before there is a significant change in pH |
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Term
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Definition
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Term
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Definition
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Term
| what happens at the cathode? |
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Definition
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Term
| electrons flow from __________ to __________ |
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Definition
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