Q1 : Week 7 – 10/10 – 10/14
Jump to: Tuesday, Wednesday, Thursday, Friday
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10/10 – Monday – Columbus Day – “Indigenous peoples Day”
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10/11 – Tuesday – B Day – 2, 3b/4 Lab
b) To Continue with particle and mole theory – 3b/4
Period 2 ,4 –
a) Test 1 – makeup – Review.
b) mole concept and particle theory theory in class – –Seeing atoms – Scanning Tunneling Electron Microscopy – (pizo electric crystal)
Richard Feynman said in Volume One of his Lectures on Physics:
If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generation of creatures, what statement would contain the most information in the fewest words? I believe it is the atomic hypothesis that all things are made of atoms — little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another.
Modern Atomic Theory – John Dalton!
– John Dalton – Gay – Lussac – Amadeo Avogadro
—————1800————————1803—————————————––1831———————————-—--1860———–———–1905
Voltaic Pile Humphrey Davis Michael Faraday’s Mole Concept Atoms created! electrolysis of water Laws of electrolysis created. finally
accepted!
Period 3b – Lab 4 complete
Electrolysis of water :
Particle / Mole Theory Presentation:
Objectives:
1. Calculate the Thickness of an aluminum and copper foil (thin piece of metal).
2. Determine the number of atoms high a copper foil and aluminum foil are using volume, density and unit cell calculations.
The metal foil lab activity is not a formal writeup but please complete it as per the procedure in the handout that I gave. A piece of paper with your work neatly written with units and sig figs showing all calculations will suffice.
Discussed the volume unit relatives cm3 = ml and the conversions of m3 to cm3metric prefixes:
K H D [ ] d c m —–> micro, nano, pico
Thin Foil Lab Instructions:
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10/11 – Tuesday’s Homework: –
1: Complete the Mole Concept Lecture. I will post what time you can start based on how far we got with each class. The lecture below starts from the G(r)eeks!
Period 2 : Please Start the video below at the 6:23 mark to the end.
Period 3b/4: Please Start the video below at the 14:08 mark to the end.
1 : Mole and Particle Concept Lecture :
End Of Tuesday!
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10/12 – Wednesday – A Day – 2/3a Lab, 4
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10/12 – Wednesday Homework: –
1: Please view last night’s lecture again BUT start at 27:29 by clicking the video below. It will automatically start at 27:29. It will review the Law of Combining Volumes (by Gay- Lussac). Please view this until to 34:20.
2: Please use the Law of Combining volumes tutorial below to complete the worksheet below. You could just complete the worksheet and view with key, if you get the concept.
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1 : Mole and Particle Concept Lecture : It will start at 27:29 when you start this.
2: Law of Combining Volumed Tutorial :
Jump to: Thursday Homework
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10/13 – Thursday – B Day – 2, 3b/4 Lab
c) To Complete Lab 4 – mole and unit cell calculations – conclusion questions – 3b/4
Period 2 ,3b –
I will complete the Particle Mole Concept IN CLASS – I will reiterate the most important concepts from the homework lecture you viewed for the last 2 nights homework.
Period 4 –
a) Completed mole and particle concepts that allowed us to START doing chemist
b) Complete Lab 4.
Particle / Mole Theory Presentation:
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10/13 – Thursday Homework: –
*Please read the following below before you begin your homework.
We will complete next group of historical labs based on what was done as soon as the SOLVAY conference ended. Chemical formulas will be built based on the percentages of mass determined experimentally.
In out Lab 5 we will determine the percent by mass of compound (hydrate) experimentally. SINCE compounds have fixed ratios or chemical formulas, this is a value that can help a chemist analyze and identify it.
In Lab 6 we will build a chemical formula of the hydrate by using the percentages of each part of the compound that we separate.Using the mole concept we will create a how many ratio (chemical formula)!!!
The homework tonight will based on starting with % by masses to determine the chemical formula (fixed ratio of how many atoms). We will perform these type of experiments that was done after the Solvay conference, which was first step to determining the chemical formulas.
This is the beginning of Analytical Chemistry.
Law of Definite Proportions = the same compound will always have the same percentage of different elements in it. This really meant that the same compounds have the same chemical formulas!!
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1: AP Lecture : Calculating chemical formulas from percent by masses (that are obtained through labs).
End of Thursday!.
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10/14 – Friday – A Day – 2/3a Lab, 4
b) Analytical Chemistry begins with determining percent by mass (Hydrate lab) –
Our homework has been based on starting with % by masses to determine the chemical formula (fixed ratio of how many atoms) or we had to get the % by mass through combustion analysis. We will perform the type of experiment that was done after the Solvay conference which was first step to determining the chemical formulas.
Period 2 :
a) Begin Lab 5 – Percent by mass of a Hydrate – Objectives and heating.
Period 3a :
a) Make final mass measurements.
b) Calculate the percent by mass of water in the copper (II) pentahydrate
Period 4 :
a) Begin Lab 5 – Percent by mass of a Hydrate – Objectives and heating.
Richard Feynman said in Volume One of his Lectures on Physics:
If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generation of creatures, what statement would contain the most information in the fewest words? I believe it is the atomic hypothesis that all things are made of atoms — little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another.
Particle / Mole Theory Presentation:
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3a/4 Lab – Lab 5 – Percent mass of water in a Hydrate
LAB 5 – copper sulfate pentahydrate lab.pdf
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10/14 – Friday’s Homework: –
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2. Please watch lecture 0a, which is posted below with Thursday nights worksheet (side 2 – questions 3 of Analytical Chemistry I – determining chemical formulas.pdf. This the other side of the worksheet that we worked on Thursday night. We will do question 3 together before you do question 4 on your own. Tonight we will use analytical chemistry (discovering formulas using particle and mole theory in Combustion Analysis.) Please read these notes before you begin.
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1: Video Review of the Empir&Molec worksheet : Calculating chemical formulas (empirical and molecular formulas) from percent mass data with Hydrates!
2: AP Lecture 0a : Calculating chemical formulas from Combustion analysis (that are obtained through labs).
End of Week 7!