Wednesday, March 7, 2012
Wednes-Day 1
AP Chem - we discussed the causes of acidic, basic, and neutral salts, seeing that the ions that make up a salt are either inert in water (group 1 cations, strong acid conjugate base anions) or are actually weak Bronsted acids or bases that react with water to produce excess hydronium or hydroxide ions.
We wrote out these reactions, thus seeing the cause of the solution type.
We then did quantitative calculations of the pH of salt solutions containing either an acidic cation or a basic anion; for this we needed pK (a or b) information either directly of the ion in the salt OR of the ion's conjugate.
We also saw how to determine the slight acidity or basicity of a salt made of both a Bronsted acid cation and a Bronsted base anion.
Bio - we reviewed for tomorrow's exam by doing a detailed comprehensive explanation of nerve cell electrochemical communication to regulate the body i.e. to maintain homeostasis. See the remainder of the answer on Edline.
We wrote out these reactions, thus seeing the cause of the solution type.
We then did quantitative calculations of the pH of salt solutions containing either an acidic cation or a basic anion; for this we needed pK (a or b) information either directly of the ion in the salt OR of the ion's conjugate.
We also saw how to determine the slight acidity or basicity of a salt made of both a Bronsted acid cation and a Bronsted base anion.
Bio - we reviewed for tomorrow's exam by doing a detailed comprehensive explanation of nerve cell electrochemical communication to regulate the body i.e. to maintain homeostasis. See the remainder of the answer on Edline.
# posted by C @ 5:16 PM 
