Wednesday, November 5, 2008

 

Wednes-Day 2

AP Chem- GREAT NEWS so far... I just graded six Stoichiometry exams in a row and ALL of them were A's or better! Hoping that the streak continues...right now, I'll just bask in your excellent achievement on this difficult exam.
we did some descriptive chemistry, writing and balancing the formula and net ionic equations for each of the four common "gas forming" reactions. We noted that ALL molecules are always written with their complete formula with ONE exception: STRONG acid molecules (there are ONLY SIX of them) are written with the FIRST H+ ionized along with the resulting anion X-.
Soluble salts are written as SEPARATE/dissociated AQUEOUS ions (if in aq. solution), insoluble salts are with their complete formula and kept in the solid (insoluble) phase. Strong bases are written as separate dissociated hydroxide ions (and the cation, M+) whereas weak bases are written with their complete undissociated formulas.
We then looked at the various "versions" of the ideal gas law: Boyles's, Charles's, Gay-Lussac's, and Avogadro's Laws are really the ideal gas law with certain variables held constant.
Tomorrow, we will explain the CAUSES of each gas law in terms of "kinetic-molecular" theory, which is just a fancy way of saying (1) molecular collision frequency and (2) force of molecular collisions.

Bio 6- we began our new unit on Transcription and Translation, which makes up the central DOGMA of molecular biology. These two processes account for/cause ALL of your traits/potentials!
We saw the OTHER major purpose of DNA: to act as a template/pattern for mRNA, which takes the DNA code to the ribosomes where that coded information is "translated" into the particular sequence and number of amino acids that make up the proteins that CAUSE your traits.

Bio 7/8 - we began our new unit on Transcription and Translation, which makes up the central DOGMA of molecular biology. These two processes account for/cause ALL of your traits/potentials!
We saw the OTHER major purpose of DNA: to act as a template/pattern for mRNA, which takes the DNA code to the ribosomes where that coded information is "translated" into the particular sequence and number of amino acids that make up the proteins that CAUSE your traits.



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