Question

w

Answer 1

Chemistry is my least favorite also o.o

Answer 2

I'm not really good in Chem, but maybe
@aaronq @abb0t @matt101 @Australopithecus

they can help you (:

Answer 3

For any reaction you're given, you can always find the equation for the equilibrium constant in the same way: concentration (or partial pressure) of products over concentration (or partial pressure) of reactants.

The numerator will have the concentration (or partial pressure) of each product, raised to its stoichiometric coefficient (the number beside it in the balanced chemical reaction). The denominator will have the concentration (or partial pressure) of each reactant, raised to its stoichiometric coefficient.

Also note that pure solids and liquids are excluded from the equation. Only gases and aqueous compounds are used.

Answer 4

The reason the equation is set up in this way is because Keq is telling you how MUCH the reaction has proceeded under whatever conditions.

If the reaction proceeds significantly in the forward direction, Keq will be high, because the equilibrium concentration of products will be high and the equilibrium concentration of reactants will be low.

If the reaction does not proceed significantly in the forward direction, Keq will be low, because the equilibrium concentration of products will be low and the equilibrium concentration of reactants will be high.

So...by looking at how big or small Keq is, you can get a sense of how favourable the reaction is under your conditions.