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March 25, 2017

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Write equilibrium Constant expressions (k) for the following reactions:
Ni(s)+ 4CO(g) <-> Ni(CO)₄
HF(aq) <-> H(aq) + F(aq)

Cl₂(g)+2Br(aq) <-> Br₂(l) + 2Cl(aq)

  • Chemistry - ,

    What do you not understand about how to write these expressions? It's just "follow the rules."

  • Chemistry - ,

    when the element have different states, ie. (aq) (s) (g) etc. doesn't that change the way you write the constant expressions?

  • Chemistry - ,

    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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