Thursday, January 19, 2012
Thurs-Day 2
AP Chem - we looked at how experimental data is collected and organized so that the rate law for a given reaction can be determined; this is a two-step process involving many trials in which initial reaction rate is determined for several different initial concentrations of a given reactant. Then, the rate vs. initial concentration data is plotted, showing the reaction order with respect to that particular reactant depending on whether a straight line or exponential curve appears.
We began reaction mechanisms, explaining the three requirements for a plausible/likely mechanism for a given overall reaction:
1. the sum of the elementary steps MUST add up to the net equation
2. the rate law of the SLOW/rate-determining step MUST match the EXPERIMENTALLY determined rate law.
3. Don't forget, a plausible mechanism should typically contain unimolecular or bimolecular collisions in each elementary step because a ter-molecular collision (or greater) is much less likely.
Bio - we began our new unit on transport and excretion, which focuses on the circulatory, respiratory, and excretory systems. We focused on the parts of the circulatory system, explained how complex organisms have CLOSED circulatory systems (the fluid/blood is always contained IN the tubes/vessels), for efficient direction of the nutrient/essential chemical-transporting blood.
We looked at the pump, fluid, and tubes i.e. the heart, blood, and arteries/veins/capillaries, and the structure of each part.
We began reaction mechanisms, explaining the three requirements for a plausible/likely mechanism for a given overall reaction:
1. the sum of the elementary steps MUST add up to the net equation
2. the rate law of the SLOW/rate-determining step MUST match the EXPERIMENTALLY determined rate law.
3. Don't forget, a plausible mechanism should typically contain unimolecular or bimolecular collisions in each elementary step because a ter-molecular collision (or greater) is much less likely.
Bio - we began our new unit on transport and excretion, which focuses on the circulatory, respiratory, and excretory systems. We focused on the parts of the circulatory system, explained how complex organisms have CLOSED circulatory systems (the fluid/blood is always contained IN the tubes/vessels), for efficient direction of the nutrient/essential chemical-transporting blood.
We looked at the pump, fluid, and tubes i.e. the heart, blood, and arteries/veins/capillaries, and the structure of each part.
# posted by C @ 7:10 PM 
