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K is the constant you get for the ratio of the concentration of products at equilibrium to the concentration of reactants at equilibrium. Q is the ratio of products to reactants at any time. Q is used as a point of comparison to K to determine which direction the reaction will proceed to reach equilibrium.
Last edited by Ally Huang- 1F on Thu Jan 09, 2020 3:23 pm, edited 1 time in total.
Q is used to evaluate the concentration of reactants and products at any given point in a reaction. If Q = K, then the reaction is in equilibrium at that time. If Q>K, then that means there are more reactants present at that time than there would be if the reaction was in equilibrium. If Q<K, that means that there are more products at that point than there would be if the reaction was in equilibrium.
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