All GRE Subject Test: Chemistry Resources
Example Question #1 : Equilibrium Constant
In the above reaction, by what factor would the reaction quotient change if the concentration of were doubled?
For a general chemical equation , where A, B, C, and D are elements and the Greek letters are their coefficients, we have the reaction quotient equation:
We can find the reaction quotient equation for our reaction by substituting the variables.
Notice that the concentration of is in the denominator and is squared, so doubling the concentration of changes the reaction quotient by a factor of one-fourth.