The position of equilibrium is always determined by the condition that the reaction quotient,must equal the equilibrium constant,. If the mixing in of an additional amount of reactant or product destroys that equality then the reacting system will shift in such a way as to restore the equality (which is in accordance with the Le Chatelier’s principle. Le Chatelier’s principle states that a system at equilibrium, when subjected to a disturbance, respond in a way that tends to minimize the effect of the disturbance). That implies that some of the added reactant or product must be removed by the reacting system and the amounts of the other components will also be affected. These adjustments restore the concentrations to their (new) equilibrium values.
Chegg is one of the leading providers of homework help for college and high school students. Get homework help and answers to your toughest questions in math, calculus, algebra, physics, chemistry, science, accounting, English and more. Master your homework assignments with our step-by-step solutions to more than 3000 textbooks. If we don't support your textbook, don't worry! You can ask a homework question and get an answer in as little as two hours. With Chegg, homework help is just a few clicks away.