Wednesday, January 03, 2007

 

three-day week

Welcome back to school! I hope that your New Year's resolutions included getting an A in Chemistry.

Honors: by Friday, MAKE SURE that you have your Bonding test fully, completely, and NEATLY corrected down to the most minute detail (including DRAWINGS, Zeff calculations, and electron transfers), especially for the explanation of the bonding process/potential energy diagram.
We reviewed the Stock naming system for molecules (NON-metal compounds!) and the common names for several molecules; then, we learned how to name binary and ternary acids. Don't forget, ALL binary acids begin with the TWO syllable prefix "HYDRO". NO ternary acids begin with "hydro" ; ternary acids change their polyatomic ion roots from "ate" to "ic" or from "ite" to "ous".
Check out the compound naming tutorial on the links to the left.
Tomorrow, we will continue with the naming of acids and bases.

Regents: we reviewed the Stock naming system for molecules
(NON-metal compounds!) and the common names for several molecules such as ammonia, methane, benzene,and glucose.
Check out the compound naming tutorial on the links to the left.


AP: we did a heteronuclear MO problem before segueing into Hess's Law for heats of solution. Whether the dissolving process for a given solute-solvent combination is exothermic or endothermic depends on the energy required to overcome the intermolecular or interparticle attractions among the solute particles in order to separate them and also the energy required to overcome the intermolecular or interparticle attractions among the solvent particles in order to separate them. The final factor is called the enthalpy of hydration or the enthalpy of solvation, which is a measure of the strength of attraction of solute to solvent particles/molecules.

We started to review Raoult's Law diagrams for an ideal solution (which obeys Raoult's Law). These diagrams will allow us to quantitatively figure the composition of the liquid and vapor phases during a distillation in which vaporization and condensation cycles repeatedly occur.



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