When the concentration of a system is changed:

A. The equilibrium constant changes.
B. Either the numerator or the denominator of the mass action expression will change.
C. The mass action expression changes exponents.
D. The concentrations change to maintain the original value of K.

Question

When the concentration of a system is changed:

A. The equilibrium constant changes.
B. Either the numerator or the denominator of the mass action expression will change.
C. The mass action expression changes exponents.
D. The concentrations change to maintain the original value of K.

revircs · Answer

I am not 100% sure about the rest, but the Kw is determined by concentrations. For example: Kw=[products]/[Reactants]. So, if one of these values were to change, Kw would also change.

revircs · Answer

From what I just learned about mass action expressions ( https://www.youtube.com/watch?v=54RZE73QMDU) the same rule will apply.

revircs · Answer

The mass action expression will not change in exponents because that has to do with coefficients within the balanced chemical equation.

anonymous · Answer

According to Le Chatelier's principle the equilibrium will displace the concentration towards the reactants or the products to mantain the original value of K, as K is a constant it will not change. What actually changes is the reaction quotient, When $$Q _{c}=K _{c}$$  Then the system is  in equilibrium