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- May 16, 2008
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Ok so I just have a few things that I cant keep straight. I dont understand if they give you one molecule how are you suppose to know if it is an Arreheious acid/ base, Lewis acid and base or Bronstead acid or base especially if they only give you one molecule such as BF3 (more general question not what BF3 is because I know it is Lewis) and I know the general definitions just dont understand how to use the definition to tell which it is.
Also I am having some trouble with two things and knowing when to use each. I dont know if they go with acid or ksp's or what. So there are two different problems 1. use (x^2/ M of reactant) = molarity of overall.
2. you can use the short cut 27x^3, 4x^2 or x^2.
I dont know when each are used and I know it is very vague but that is to the point that I understand it and need help drastically because I know that they will be a question on the test and need every question.
I know it sounds dumb but it is something I just cant get a grasp on and examples would be great. Thanks
Also I am having some trouble with two things and knowing when to use each. I dont know if they go with acid or ksp's or what. So there are two different problems 1. use (x^2/ M of reactant) = molarity of overall.
2. you can use the short cut 27x^3, 4x^2 or x^2.
I dont know when each are used and I know it is very vague but that is to the point that I understand it and need help drastically because I know that they will be a question on the test and need every question.
I know it sounds dumb but it is something I just cant get a grasp on and examples would be great. Thanks