Thursday, April 8, 2010
Thurs-Day 2
Bio - we discussed how Mendel discovered the Law of Segregation/Separation of "heredity factors" (which were really alleles on homologous chromosomes) by crossing/mating F1 generation plants with each other. The hidden or recessive hereditary factor was SEEN again in about 1 out of every 4 F2 offspring plants. Mendel correctly concluded that the hereditary factors must SEPARATE as sex cells are made. The recessive "short" hereditary factor could be "recombined" with a short hereditary factor in the opposite sex cell and then be expressed in the F2 offspring!
AP Chem - Check out Blackboard for dozens of buffer and titration questions with annotated answers as well as a titration tutorial!
We completed the quantitative titration of a weak acid by a strong base; we then reinforced the titration problem solving by showing the opposite titration, a weak base by a strong acid; here we saw similar stages of pH change but from higher to lower.
We began to discuss pH indicators, and showed that they change color based on the concentration of hydronium ion in solution (the pH of the solution).
AP Chem - Check out Blackboard for dozens of buffer and titration questions with annotated answers as well as a titration tutorial!
We completed the quantitative titration of a weak acid by a strong base; we then reinforced the titration problem solving by showing the opposite titration, a weak base by a strong acid; here we saw similar stages of pH change but from higher to lower.
We began to discuss pH indicators, and showed that they change color based on the concentration of hydronium ion in solution (the pH of the solution).
# posted by C @ 11:15 AM 
