## Calculating the equilibrium composition

elizabethrojas1G
Posts: 44
Joined: Fri Sep 25, 2015 3:00 am

### Calculating the equilibrium composition

how do we determine the change in molar concentration?

amyjunus1A
Posts: 26
Joined: Fri Sep 25, 2015 3:00 am

### Re: Calculating the equilibrium composition

Can you further explain your question? Do you mean in terms of change in molar concentration for equilibrium or for change in molar concentration in one molecule in general?

elizabethrojas1G
Posts: 44
Joined: Fri Sep 25, 2015 3:00 am

### Re: Calculating the equilibrium composition

Like on the ICE chart, how do we know if it should be +x,-x, +2x, etc.?

Chem_Mod
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### Re: Calculating the equilibrium composition

First, determine if Q<K or if Q>K. For example, if there are little or no products to start with, then Q<K so the reaction will proceed forward. Then you know that the reactants will have negative changes and the products will have positive changes.

The coefficient of the change (x, 2x etc) is simply the coefficient of that species in the balanced reaction.

elizabethrojas1G
Posts: 44
Joined: Fri Sep 25, 2015 3:00 am

### Re: Calculating the equilibrium composition

Oh okay, I completely understand it now. Thank you

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