Tuesday, September 9, 2008
Tues-Day 2
AP Chem- tomorrow we will have our first unit exam, which is based on the summer assignment/Chapter 1, the solubility rules, and the list of polyatomic ions.
We discussed some more means of physically separating mixtures: (re)crystallization is the process by which solutes of different solubilities in a given solvent at a given temperature are separated. The solution is first heated so that all solutes are dissolved. Then, as the solution cools, the solute(s) that are least soluble begin to precipitate out; these solutes are subsequently filtered out via filtration.
We then discussed the basis of the solubility rules: the ionic compounds composed of ions with the greatest charge density have the strongest ionic bonds and are thus the least soluble.
We then went through the always soluble to the never soluble compounds, how to write their formulas, and how to spell their names.
We also discussed the difference between accuracy (= TRUTH or TRUE VALUE) and precision ( = number of decimal places in a measurement or repeatability of a measurement to a particular decimal place).
Bio 6- we finished our experimental design activity; there was a lot to consider in this experiment so make sure that you review each question that we considered because you WILL be applying this general process to MANY different scientific questions throughout the year.
I handed out this unit's objectives/review questions hw; that is due in class on Friday and will be worth 25 points!
We began to discuss graphing, which we will finish tomorrow.
Bio 7/8- we finished our experimental design activity; there was a lot to consider in this experiment so make sure that you review each question that we considered because you WILL be applying this general process to MANY different scientific questions throughout the year.
I handed out this unit's objectives/review questions hw; that is due in class on Friday and will be worth 25 points!
We began to discuss graphing, which we will finish tomorrow.
We discussed some more means of physically separating mixtures: (re)crystallization is the process by which solutes of different solubilities in a given solvent at a given temperature are separated. The solution is first heated so that all solutes are dissolved. Then, as the solution cools, the solute(s) that are least soluble begin to precipitate out; these solutes are subsequently filtered out via filtration.
We then discussed the basis of the solubility rules: the ionic compounds composed of ions with the greatest charge density have the strongest ionic bonds and are thus the least soluble.
We then went through the always soluble to the never soluble compounds, how to write their formulas, and how to spell their names.
We also discussed the difference between accuracy (= TRUTH or TRUE VALUE) and precision ( = number of decimal places in a measurement or repeatability of a measurement to a particular decimal place).
Bio 6- we finished our experimental design activity; there was a lot to consider in this experiment so make sure that you review each question that we considered because you WILL be applying this general process to MANY different scientific questions throughout the year.
I handed out this unit's objectives/review questions hw; that is due in class on Friday and will be worth 25 points!
We began to discuss graphing, which we will finish tomorrow.
Bio 7/8- we finished our experimental design activity; there was a lot to consider in this experiment so make sure that you review each question that we considered because you WILL be applying this general process to MANY different scientific questions throughout the year.
I handed out this unit's objectives/review questions hw; that is due in class on Friday and will be worth 25 points!
We began to discuss graphing, which we will finish tomorrow.
# posted by C @ 8:04 PM 
