Qualitative Equilibrium (HSC SSCE Chemistry): Flashcards
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10 cards from this deck
What is dynamic equilibrium?
What is dynamic equilibrium?
Forward & reverse reactions occur at equal rates in closed system
Two requirements for reaching equilibrium
Two requirements for reaching equilibrium
Closed system and reversible reaction
Are forward & reverse rates equal at equilibrium?
Are forward & reverse rates equal at equilibrium?
Yes, they are equal
Do concentrations stay constant at equilibrium?
Do concentrations stay constant at equilibrium?
Yes, but they need not be equal
Initial state: reactant concentration & forward rate
Initial state: reactant concentration & forward rate
High reactant concentration, rapid forward reaction
Forward reaction rate change as equilibrium is reached
Forward reaction rate change as equilibrium is reached
Decreases as reactant concentration drops
Reverse reaction rate change as equilibrium is reached
Reverse reaction rate change as equilibrium is reached
Increases as product concentration rises
Rate vs time graph appearance at equilibrium
Rate vs time graph appearance at equilibrium
Two lines meet and plateau at same value
Concentration vs time graph at equilibrium
Concentration vs time graph at equilibrium
All lines become horizontal (constant concentrations)
Observable properties at equilibrium
Observable properties at equilibrium
Stay unchanged (e.g. colour, mass)