Wednesday, September 21, 2011
Wednes-Day 2
AP Chem - we did another gravimetric analysis problem, using the percent compsition method. We simply write a conservation of mass equation for the element or ion of interest of the reactant and product compound, and then set up the equation for those two masses by multiplying the percent composition of the element or ion of interest times the sample mass. That is one equation with one unknown, which can be solved with a Ti-83,84, 89, or by using graphical methods with your calculator.
Bio - we reviewed our first unit exam, emphasizing the instructions, test-taking skills, mnemonics, and other advice that I gave each of you BEFORE the exam. Those who followed the advice, studied, practiced, and reinforced the methods as we had done in class, naturally did very well. Those who did not listen or could not be bothered to improve their skills as directed, lost many points due to carelessness, insufficiency, or just ignoring the requisite information; of course, we can always learn from these mistakes and get on board with becoming better students.
In 7/8, we looked at the elements and stuctures of carbohydrates, and how to synthesize a complex carbohydrate (polysaccharide) from a simple carbohydrate (monosaccharide) via "dehydration" synthesis i.e. this process also releases/produces water, thus the "dehydration" term.
We also looked at the reverse process of breaking apart (lysing) a complex molecule into simpler building blocks by adding water i.e. HYDROlysis.
Bio - we reviewed our first unit exam, emphasizing the instructions, test-taking skills, mnemonics, and other advice that I gave each of you BEFORE the exam. Those who followed the advice, studied, practiced, and reinforced the methods as we had done in class, naturally did very well. Those who did not listen or could not be bothered to improve their skills as directed, lost many points due to carelessness, insufficiency, or just ignoring the requisite information; of course, we can always learn from these mistakes and get on board with becoming better students.
In 7/8, we looked at the elements and stuctures of carbohydrates, and how to synthesize a complex carbohydrate (polysaccharide) from a simple carbohydrate (monosaccharide) via "dehydration" synthesis i.e. this process also releases/produces water, thus the "dehydration" term.
We also looked at the reverse process of breaking apart (lysing) a complex molecule into simpler building blocks by adding water i.e. HYDROlysis.
# posted by C @ 8:06 PM 
