Flashcards for Chemistry Chapter 17

What is chemical equilibrium?
the state in which forward and reverse reactions balance each other because they occur at equal rates
What is equilibrium constant?
Keq is the numerical value that describes the ratio of product concentration to reactant concentrations, with each raised to the power ocrresponding to its coefficient in the balanced equation
What is heterogeneous equilibrium?
a state of equilibrium taht occurs when the reactants and products of a reaction are present in more than one physical state
What is homogeneous equilibrium?
a state of equilibrium that occurs when all the reactants and products of a reaction are in the same physical state
What is the law of chemical equilibruim?
states that at a given temperature, a chemical system may reach a state in which a particular ratio of reactant and product concentrations has a constant value
What is a reversible reaction?
a reactoin that can take place in both the forward and reverse directions; leads to an equilibrium state where the forward and reverse reactions occur at equal rates andthe concentrations of reactants and products remain constant
What is Le Chatelier’s principle?
States that if a stress is applied to a system at equilibrium, the system shifts in the direction that relieves the stress
What is the solubility product constant?
Ksp, which is an equilibrium constant for the dissolving of a sparingly soluble ionic compound in water
What is the equation for equilibrium constant?
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In what two states of matter are not included in the equilibrium constant expression?
liquids and solids
If Keq is greater than 1, what part is favored?
products
If Keq is less than 1, what part is favored?
reactants
What does the equilibrium do if you add reactants?
shift to the right
What happens if you remove products?
the equilibrium shifts to the right and more products are produced
What happens if you add products?
equilibrium will shift to the left
What will happen if you decrease the volume?
increased presure will cause the reaction to shift in the direction of the fewer gas particles
What happens in you decrease the temperature of an exothermic reaction?
it will shift to the right
What will happen if you increase the temperature of an exothermic reaction?
it will shift to the left
What will happen if you increase the temperature of an endothermic reaction?
it will shift to the right
What will happen if you decrease the temperature of an endothermic reaction?
it will shift to the left
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