equilibrium

[00945584]

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how can you redefine equilibrium of a reaction?
1. I know temperature will cahnge equilibrium.
2. Will adding concentrations change equilibrium?
3. Will adding substances change equilibrium?

 

[drchem]

how can you redefine equilibrium of a reaction?
1. I know temperature will cahnge equilibrium.
2. Will adding concentrations change equilibrium?
3. Will adding substances change equilibrium?

Not quite sure what you're asking, but I think I have an idea. Yes, adding substances does change the equlibrium. For example, if we have the reaction:

2 NO2 <--> N2O4

Adding NO2 would force the equlibrium to the right, producing more N2O4, because K is a constant, and more N2O4 would need to be produced to keep it a constant. It also works with ions (it's called the common-ion effect, IIRC) so for example, if you had a solution of, say, Ca(OH)2, which isn't very soluble in water, and you added KOH, the extra hydroxide you're adding would force some Ca(OH)2 to precipitate.