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Equilibrium state
A reversible reaction is written with a double arrow: . Equilibrium is reached when the forward and reverse rates are equal: concentrations no longer change, but the equilibrium stays dynamic at the molecular level.
High school11 min
Chemical equilibrium: Q, K and the equilibrium composition
Write a reaction quotient, predict the direction of change by comparing Q with K, and compute an equilibrium composition with an ICE table.
The essentials
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Reaction quotient
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Equilibrium constant
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Direction of change
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