Monday, April 27, 2009
Mon-Day 1
AP Chem- Electrochemistry exam is this Wednesday; sorry that I can't stay after school on Tuesday but you can email me that night after 8PM if you have last minute questions.
We focused on the "other" type of electrochemical cell: the ELECTROLYTIC CELL.
We covered the setup and sign conventions for this cell in which non-spontaneous reactions are driven by an external voltage source/battery. Only one cell/container is necessary and no salt bridge is required because the connected battery insures a steady flow of electrons.
We did several quantitative problems involving masses/moles of a metal reduced at the cathode or moles/volume of a gas produced at the anode. We added one other step to these problems by accounting for the efficiency of the battery, which affects the quantity of charge delivered per second.
Other than our one day of "nuclear physics", almost all of our course material has now been completed. We just have a few classic redox equations to learn in descriptive chemistry and a review/practice of some key lab techniques. The rest is all test review and test-taking skills!
Great to see all who are practicing for the SAT II Chem also because that is good review/experience for the Part I of the AP Chem exam.
Bio 6/7- Here's that 60 Minutes video from Sunday's broadcast about elephants- amazing creatures!
Watch CBS Videos Online
Discussed the evolution of penicillin-resistant bacteria and showed that a given antibiotic is a selection agent AGAINST non-resistant strains and FOR resistant strains, which is how antibiotic-resistant bacteria increase in frequency in hospitals/environments in which antibiotics are frequently prescribed or over-prescribed.
We finished the comparative biochemistry lab.
Bio 8- Here's a 60 Minutes video from Sunday's broadcast about elephants- amazing creatures!
Watch CBS Videos Online
Discussed the evolution of penicillin-resistant bacteria and showed that a given antibiotic is a selection agent AGAINST non-resistant strains and FOR resistant strains, which is how antibiotic-resistant bacteria increase in frequency in hospitals/environments in which antibiotics are frequently prescribed or over-prescribed.
We focused on the "other" type of electrochemical cell: the ELECTROLYTIC CELL.
We covered the setup and sign conventions for this cell in which non-spontaneous reactions are driven by an external voltage source/battery. Only one cell/container is necessary and no salt bridge is required because the connected battery insures a steady flow of electrons.
We did several quantitative problems involving masses/moles of a metal reduced at the cathode or moles/volume of a gas produced at the anode. We added one other step to these problems by accounting for the efficiency of the battery, which affects the quantity of charge delivered per second.
Other than our one day of "nuclear physics", almost all of our course material has now been completed. We just have a few classic redox equations to learn in descriptive chemistry and a review/practice of some key lab techniques. The rest is all test review and test-taking skills!
Great to see all who are practicing for the SAT II Chem also because that is good review/experience for the Part I of the AP Chem exam.
Bio 6/7- Here's that 60 Minutes video from Sunday's broadcast about elephants- amazing creatures!
Watch CBS Videos Online
Discussed the evolution of penicillin-resistant bacteria and showed that a given antibiotic is a selection agent AGAINST non-resistant strains and FOR resistant strains, which is how antibiotic-resistant bacteria increase in frequency in hospitals/environments in which antibiotics are frequently prescribed or over-prescribed.
We finished the comparative biochemistry lab.
Bio 8- Here's a 60 Minutes video from Sunday's broadcast about elephants- amazing creatures!
Watch CBS Videos Online
Discussed the evolution of penicillin-resistant bacteria and showed that a given antibiotic is a selection agent AGAINST non-resistant strains and FOR resistant strains, which is how antibiotic-resistant bacteria increase in frequency in hospitals/environments in which antibiotics are frequently prescribed or over-prescribed.
# posted by C @ 1:04 PM 
