How did the addition of HCl affect the direction of the shift in equilibrium?
This may be innacurate but I am currently doing an AP question
soo this is my best guess. I believe because when you wrtie the
equation and then set up an ice table(or however you find
equillbrium) HCl is in the equation so it must be taken into
account. If something were to change like pressure this could
determine what direction the reaction goes(forward or backwards)
according to le' chateliers principle.