HOW TO: ICE CHARTS
Posted: Fri Dec 04, 2015 12:29 am
This is an overview on filling out and ICE chart.
I - Initial Concentration
C - Change in Concentration
E - Equilibrium Concentration
For I - All the known concentrations should be filled in, for the products it will typically be 0 because no products have been formed. Many equilibrium problems give the initial concentrations of reactants and the equilibrium constant.
For C - Note that the equation will shift in only one direction then indicate an amount (x) that it shifts. Always write the stoichiometric coefficient in front of x and put a minus sign in front of any species for which the concentration decreases and use a plus sign in front of x of any species for which the concentration increases.
For E -The expressions for each species on the E line represent the concentrations of each species at equilibrium, here you can combine the I and C lines. For example if I is 0.750 M and C is -x the E will be 0.750-x.
Using the equilibrium expression then find the numerical value of X and use the value of X to determine the equilibrium concentration of all the species.
Hope this is helpful!
I - Initial Concentration
C - Change in Concentration
E - Equilibrium Concentration
For I - All the known concentrations should be filled in, for the products it will typically be 0 because no products have been formed. Many equilibrium problems give the initial concentrations of reactants and the equilibrium constant.
For C - Note that the equation will shift in only one direction then indicate an amount (x) that it shifts. Always write the stoichiometric coefficient in front of x and put a minus sign in front of any species for which the concentration decreases and use a plus sign in front of x of any species for which the concentration increases.
For E -The expressions for each species on the E line represent the concentrations of each species at equilibrium, here you can combine the I and C lines. For example if I is 0.750 M and C is -x the E will be 0.750-x.
Using the equilibrium expression then find the numerical value of X and use the value of X to determine the equilibrium concentration of all the species.
Hope this is helpful!