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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Shing on March 12, 2009, 10:34:15 PM

Title: Chemical Equilibrium Problem Types
Post by: Shing on March 12, 2009, 10:34:15 PM

Type Starting Situation At Equilibrium Solution 
1 Given reactants with large K mostly products present.
2 Given reactants with small K mostly reactants, very little products
3 Given products with large K mostly products present, very little reactants
4 Given products with small K mostly reactants present, very little products
5 Any combination of reactants and products with 1x10-3 < K < 1x103 almost equal mixture of products and reactants

I need a resource that can teach me methods to solve the above kind of problems. I cant seem to find anything useful, searching on Yahoo.


Thanks

Title: Re: Chemical Equilibrium Problem Types
Post by: Borek on March 13, 2009, 04:02:01 AM

See general outline here:

http://www.chembuddy.com/?left=pH-calculation&right=general-pH-calculation

It doesn't split equilibrium calculations into different types as you listed, but instead describes general approach that will work for all of those. You just have to ask yourself a question - what can be ignored? In the first case you have listed, most likely concentrations of reactants are so low they can be dropped from all sums - and so on.