Monday, October 14, 2013
At the beginning of class, we went over our quizzes. There are still people who need to take this quiz. Ms. Friedmann gave the message again after this assessment: Congratulations on failing!
*dispute on the origin of sodium (please comment below if you have the magic answer of the root)*
Next, we took notes on Stoichometry. These notes can be found in the moodle folder. Below are my notes:
Remember the moles are in the center of the universe and here are some more conversions added. The focus points that we use are highlighted in red.
In order of beginning to end (left to right) like the mass conversion to moles map from last unit.
*All one line below
(molar mass thing 1) moles for thing 1 (use coefficients of balanced equation) moles for thing 2 (molar mass thing 2)
These are the coefficients of the balanced equation
(because units are lined up so they cancel out)
At the beginning of class, we went over our quizzes. There are still people who need to take this quiz. Ms. Friedmann gave the message again after this assessment: Congratulations on failing!
*dispute on the origin of sodium (please comment below if you have the magic answer of the root)*
Next, we took notes on Stoichometry. These notes can be found in the moodle folder. Below are my notes:
Remember the moles are in the center of the universe and here are some more conversions added. The focus points that we use are highlighted in red.
particles (Avagardo's number) Moles (molar mass - grams) mass
Stoichometry:
compare of thing to another (thing 1 and thing 2) (thing 2 is what you are trying to find)
In order of beginning to end (left to right) like the mass conversion to moles map from last unit.
*All one line below
(molar mass thing 1) moles for thing 1 (use coefficients of balanced equation) moles for thing 2 (molar mass thing 2)
*Conversion factors are in black
The recipe for finding how much you need is the balanced equation.
Use moles of thing 1 to find moles of thing 2 (use coefficients to convert in the situation)
So, the worksheets of #1 a ans #2 2a were done as a demo. I will show the work for worksheet #1 a like in class.
Since you have 5. moles of MnO2, that is your starting stuff (thing 1)
.5 moles MnO2 * 4 moles HCl = 20 moles HCl
1 mole MnO2
These are the coefficients of the balanced equation
(because units are lined up so they cancel out)
Homework:
1) Complete the Intro to Stoichiometry Wss (worksheets) posted in the Unit 3 Handouts folder. Due tomorrow. If you were absent today, take a look at the examples done and refer to the Intro Notes on Stoichiometry (posted in the Unit 3 Notes folder) and see if that's enough to help you get started.
2) Go to the blog and contribute to the class effort to solve the problem I posted there today. Everyone must make a constructive comment that shows your attempt to process the problem. The goal is for everyone to understand how to solve this problem by the time we meet in class tomorrow. WE ARE NOT DONE WHEN THE CORRECT ANSWER IS POSTED; WE ARE DONE WHEN EVERYONE UNDERSTANDS HOW THE CORRECT ANSWER WAS ACHIEVED.
2) Go to the blog and contribute to the class effort to solve the problem I posted there today. Everyone must make a constructive comment that shows your attempt to process the problem. The goal is for everyone to understand how to solve this problem by the time we meet in class tomorrow. WE ARE NOT DONE WHEN THE CORRECT ANSWER IS POSTED; WE ARE DONE WHEN EVERYONE UNDERSTANDS HOW THE CORRECT ANSWER WAS ACHIEVED.
Next blogger is Ashley M.
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