Q1 : Week 7 – 10/16 – 10/20
<- Week 6 – Week 7 -> Jump to: Tuesday, Wednesday, Thursday, Friday
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LAB 3 – Electrolysis of copper (II) Chloride is Late!
______________________________________________________ Jump to: Monday Homework 10/16 – Monday – A Day – 2/3a Lab, 4
b) To Continue with particle and mole theory – 3b/4
Period 2 ,4 –
a) Test 1 – makeup – Review with key.
1st Test: 2nd Test:
mean = 80.25 mean = 85.8
sd = 12.1 sd = 13.
b) mole concept and particle theory theory in class –
Using the presentation we moved to Guy – Lussac’s work in period 2/3a Using the presentation we moved to Antoine Lavoisier in period 4
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 3a –
1. Lab 4 complete
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:
_____________________________________________________ jump to: top 10/16 – Monday’s 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: Tuesday Homework / top 10/17 – Tuesday – B Day – 2, 3b/4 Lab
c) To Complete Lab 4 – mole and unit cell calculations – conclusion questions
Period 2:
1. Guy – Lussac —> mole concept/particle concept—> smallest movie
Period 3b: 1. Antoine Lavoisier —–> mole concept/particle concept—> smallest movie
–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 4 – Lab 4 complete
Particle / Mole Theory Presentation:
_____________________________________________________ jump to: top 10/17 – Tuesday’s 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!.
______________________________________________________________________________ Jump to: Wednesday Homework / top 10/18 – Wednesday – A Day – 2/3a Lab, 4
Particle / Mole Theory Presentation:
_________________________________________________________ jump to: top 10/18 – Wednesday Homework: –
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1 : Greeks to Proust – Percent Error Lecture : It will start at the halfway point!
2: Video Review of the Empir&Molec worksheet : Calculating chemical formulas (empirical and molecular formulas) from percent mass data with Hydrates!
___________________________________________________________ Jump to: Thursday Homework /top 10/19 – Thursday – B Day – 2, 3b/4 Lab
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 2,3b:
a) Begin Lab 5 – Percent by mass of a Hydrate – Objectives and heating.
Period 4:
e) Calculate the percent by mass of water in the copper (II) pentahydrate
f) Complete Lab and hand in
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.
_______________________________________________________________________ Lab 5 – Percent mass of water in a Hydrate
LAB 5 – copper sulfate pentahydrate lab.pdf
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Percent by Mass of Water in a Hydrate Lab:
______________________________________________________ jump to: top 10/19 – Thursday Homework: –
DUE Tomorrow:
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: Thin Foil Lab Instructions :
1: Thin Foil Lab measurement : If you still to measure the mass or dimensions of Al or Cu please use this video to grab those measurements
2: AP Lecture 0a : Calculating chemical formulas from Combustion analysis (that are obtained through labs).
.______________________________________________________________________ Jump to: Friday Homework/top 10/20 – Friday – A Day – 2/3a Lab, 4
a) To perform Lab 5 and Lab 6 in determining the percent by mass or the empirical formula (in hydrates).
b) To complete the error analysis of the hydrate labs
c) Complete Mole / Particular concept presentation
Period 2:
1. Begin the heating of the unknown hydrate for Lab 6
2. Complete the Final Calculations of Lab 5 – percent by mass of water
Period 3a:
Period 4:
1. Begin the heating of the unknown hydrate for Lab 6
2. Complete mole concept presentation.
Particle / Mole Theory Presentation:
*Determine the chemical formula of a hydrate:
LAB 6 – Empirical Formula analysis of Hydrate.pdf

Because of the conservation of mass by Antoine Levassuer, the mass of water that is released from the crystal (hydrate) is the same mass that was is in the crystal. THus the moles of water lost is the water that are in the crystal (in the formula ) .
The Empirical Formula of a Hydrate:
___________________________________________________ jump to: top 10/20 – Friday’s Homework: –
a) Lecture 1.1 : Molarity of ions
b) Lecture 1.2 : Preciptation analysis
End of week 7!