What if QSP is greater than KSP?
What if QSP is greater than KSP?
Ï Qsp must equal to or greater than Ksp for precipitation to occur. If Qsp < Ksp, then the reaction proceeds toward products. (i.e. to the right, ˆˆ no precipitation) If Qsp > Ksp, then the reaction proceeds to form reactants. If Qsp = Ksp, then the system reaches equilibrium.
How do you find the precipitate in chemistry?
Precipitation reactions occur when cations and anions in aqueous solution combine to form an insoluble ionic solid called a precipitate. Whether or not such a reaction occurs can be determined by using the solubility rules for common ionic solids.
How is Q related to KSP?
The reaction quotient, Q, can be used to determine whether a precipitate will form with a given concentration of ions. If Q = Ksp, a precipitate will form. If Q > Ksp, a precipitate will form. Note that precipitation may not happen immediately if Q is equal to or greater than Ksp.
How is Q calculated?
We can calculate Q by writing out the equation using the balanced reaction and then using the given concentrations. If we compare Q to K, we can see that Q > K Q > K Q>KQ, is greater than, K.
What is the K constant?
The Coulomb constant, the electric force constant, or the electrostatic constant (denoted ke, k or K) is a proportionality constant in electrostatics equations. In SI units it is equal to 8.14)×109 kg⋅m3⋅s−2⋅C−2.
What is considered a small k value?
Typically a “small” value of K is < 10^-3 and a “large” value is > 10^3. Any K value in between is viewed as intermediate, in which neither reactants or products are favored.
What is the value of the equilibrium constant K?
The equilibrium constant value is the ratio of the concentrations of the products over the reactants. This means that we can use the value of K to predict whether there are more products or reactants at equilibrium for a given reaction.
Does K increase or decrease with temperature?
Is this an exothermic or endothermic reaction? Because the K value decreases with an increase in temperature, the reaction is an exothermic reaction.
Does K change with concentration?
At constant temperature, changing the equilibrium concentration does not affect Keq because the rate constants are not affected by the concentration changes. When the concentration of one of the participants is changed, the concentration of the others vary in such a way as to maintain a constant value for the Keq.