What will most likely happen when a component is added to a reaction system at equilibrium?
a. the system will be unaffected by stress.
b. the addition of a catalyst will change the equilibrium.
c. the equilibrium position will shift away from what was added to lower its concentration.
d. the equilibrium position will shift away from what was added to increase its concentration.

C. The equilibrium position will shift away from what was added to lower its concentration.

1. Change in concentration.  

2. Change in pressure (caused by a change in volume).

3. Change in temperature.

The answer is c

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >