Posted by Aidan on Wednesday, January 27, 2010 at 9:58pm.
What do you not understand about how to write these expressions? It's just "follow the rules."
when the element have different states, ie. (aq) (s) (g) etc. doesn't that change the way you write the constant expressions?
Yes. As a general rule, solids and pure liquids don't show up in the expression.
Ni(s)+ 4CO(g) <-> Ni(CO)₄
HF(aq) <-> H(aq) + F(aq)
Cl₂(g)+2Br(aq) <-> Br₂(l) + 2Cl(aq)
So #2 is
K=(H^+)(F^-)/(HF) and the concn of each is determined by the molarity.
For #1, K = (CO)^4
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