Monday, May 12, 2008
Mon-Day 2
Bio- we discussed the flow of energy among organisms in an ecosystem. This energy flow is easily seen in a food web. A food web uses arrows to show the flow of energy, which is stored in the molecules that make up the organism, from producers (plants and algae) to primary consumers (herbivores) to secondary consumers to tertiary consumers and sometimes even beyond that.
Going from producer level to primary consumer level and beyond, the total energy of each subsequent level decreases due to the fact that 90% of the energy consumed is lost/released as heat so only 10% can be stored as potential energy in the molecules that makeup the organisms in a given level.
Chem 7/8- we did an acid-base titration using burets, Ehrlenmeyer flasks, and phenolphthalein indicator. We then learned how to use titration data to determine the molarity of an unknown acid or base solution. The important thing to include in our "voom-voom" formula is to include the number of H+ ions available to react per mole of acid and the number of OH- ions available to react per mole of base.
We defined pH and pOH from which we will develop a pH chart that relates acid and base concentrations to pH.
Chem 9- We learned how to use titration data to determine the molarity of an unknown acid or base solution. The important thing to include in our "voom-voom" formula is to include the number of H+ ions available to react per mole of acid and the number of OH- ions available to react per mole of base.
We began to define pH from which we will develop a pH chart that relates acid and base concentrations to pH.
Going from producer level to primary consumer level and beyond, the total energy of each subsequent level decreases due to the fact that 90% of the energy consumed is lost/released as heat so only 10% can be stored as potential energy in the molecules that makeup the organisms in a given level.
Chem 7/8- we did an acid-base titration using burets, Ehrlenmeyer flasks, and phenolphthalein indicator. We then learned how to use titration data to determine the molarity of an unknown acid or base solution. The important thing to include in our "voom-voom" formula is to include the number of H+ ions available to react per mole of acid and the number of OH- ions available to react per mole of base.
We defined pH and pOH from which we will develop a pH chart that relates acid and base concentrations to pH.
Chem 9- We learned how to use titration data to determine the molarity of an unknown acid or base solution. The important thing to include in our "voom-voom" formula is to include the number of H+ ions available to react per mole of acid and the number of OH- ions available to react per mole of base.
We began to define pH from which we will develop a pH chart that relates acid and base concentrations to pH.
# posted by C @ 2:31 PM 
