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21 Cards in this Set
- Front
- Back
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gaseous system must be _______ system where no ______ can __________/__________ |
closed, matter, enter/exit |
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at equilibrium, forward and reverse rxtn rates are |
equal |
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chemical equilibrium |
state of a chemical rxtn in which its forward and reverse rxtns occur at equal rates so that the concentration of the reactants and products does not change with time |
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equilibrium is static true or false |
no its dynamic |
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four categories of rxtns at equilibrium |
1. % yield 2. negligible 3. < 50% 4. >50% 5. >99.9% |
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< 50% |
reactants favored ------> |
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> 50% |
products favored <-------------- |
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equilibrium position: lies to the left |
more reactants and less products |
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equilibrium position: lies to the right |
less reactants and more products |
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ICE TABLES STAND FOR |
Initial Change Equilibrium |
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PHASE EQUILIBRIUM |
single chemical substance existing in more than one phase (state) in a closed system |
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SOLUBILITY EQUILIBRIUM |
excess solute is in contact with saturated solution -- rate of dissolving = rate of crystallizing |
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CHEMICAL RXTN EQUILIBRIUM |
static state of a reaction system where reactants and products may be favoured but the rate or forward and reverse reactions are equal |
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FORWARD REACTION |
left to right change in a written chemical equilibrium equation |
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REVERSE REACTION |
right to left change in a written chemical equilibrium equation |
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greater the Kc value the _____ the ________ are favoured at equilibrium |
more, products |
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Kc is the |
equilibrium constant |
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what changes can affect the value of Kc? |
temp and concentration changes |
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heterogenous equilibrium includes more than _ phase |
1 |
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does not include ______ or ______ in equilibrium expression (heterogenous equilibrium) |
liquid, solids |
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Heterogenous equilibrium only includes |
gases and solutions |
