what is an equilibrium constant expression?
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The equilibrium constant expression is the ratio of the concentrations of a reaction at equilibrium. ... Reactions containing pure solids and liquids results in heterogeneous reactions in which the concentrations of the solids and liquids are not considered when writing out the equilibrium constant expressions.
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Macroeconomic Equilibrium. ... Macroeconomic equilibrium is a condition in the economy in which the quantity of aggregate demand equals the quantity of aggregate supply. If there are changes in either aggregate demand or aggregate supply, you could also see a change in price, unemployment, and inflation.
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Chemical equilibrium occurs when the number of particles becoming products is equal to the number of particles becoming reactants. A dynamic equilibrium is a state where the rate of the forward reaction is equal to the rate of the reverse reaction.
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Equilibrium constants are sometimes called keq values. If you are experimenting with an acid-base reaction, the keq value is Ka, also known as acidity constant, which measures the strength of an acid in solution.
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Write the equilibrium constant expression for the reaction. Then substitute values from the table into the expression to solve for x (the change in concentration). Calculate the equilibrium concentrations. Check your answers by substituting these values into the equilibrium equation.
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The equilibrium expression for this reaction is Keq = [A-][H3O+]/[HA] = Ka For the acid ionization, Keq is written Ka and is called the acid dissociation constant. Ka values allow one to compare the strength of acids.
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1 : The equilibrium constant Kc is a constant which represents how far the reaction will proceed at a given temperature. 8.2. 2 : When Kc is greater than 1, products exceed reactants (at equilibrium). ... When much less than 1 (Kc can never be negative...so when it is close to zero) the reaction hardly occurs at all.
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The Ksp expression for a salt is the product of the concentrations of the ions, with each concentration raised to a power equal to the coefficient of that ion in the balanced equation for the solubility equilibrium.
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A solution is an assignment of values to the unknown variables that makes the equality in the equation true. In other words, a solution is a value or a collection of values (one for each unknown) such that, when substituted for the unknowns, the equation becomes an equality.
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Substituting these values in the equilibrium constant expression, And therefore, The constant ionic product for water is equal to at 25°C. In pure water, the concentration of hydrogen ions is equal to the concentration of hydroxide ions . At 25°C, both concentrations are equal to 10−7 M.
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['Normal values: HCO3: 22-26 meq/L. PCO2: 35 - 45 mmHg. pH: 7.35 - 7.45. ... ', 'Quick derivation: Carbonic acid (H2CO3) equilibrium: [H+] x [HCO3-] <---> [H2CO3] <---> [CO2] x [H2O] [H+] x [HCO3-] = K x [CO2] x [H2O] ... ', 'Final: pH = 6.1 +log (HCO3-/ (0.03 x PCO2))']
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The solubility product constant (Ksp) describes the equilibrium between a solid and its constituent ions in a solution. The value of the constant identifies the degree to which the compound can dissociate in water. The higher the Ksp, the more soluble the compound is.
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(4) The concentrations of N2O4 and NO2 are both increasing. Which statement correctly describes a chemical reaction at equilibrium? (1) The concentrations of the products and reactants are equal. (2) The concentrations of the products and reactants are constant.
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The reaction quotient is given by the same equation as the equilibrium constant (concentration of products divided by concentration of reactants), but its value will fluctuate as the system reacts, whereas the equilibrium constant is based on equilibrium concentrations.
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['Mathematically, F∝x, where F is the force applied, and x is the extension or compression of the object (usually in metres).', 'Now, F = – kx, where k is the constant of proportionality called the spring constant.']
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Static equilibrium is a state where bodies are at rest; dynamic equilibrium is a state where bodies are moving at a constant velocity (rectilinear motion). In both cases the sum of the forces acting on them is zero.
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A non-spontaneous reaction has a positive delta G and a small K value. When delta G is equal to zero and K is around one, the reaction is at equilibrium. You have learned the relationship linking these two properties. This relationship allows us to relate the standard free energy change to the equilibrium constant.