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## Q1 : Week 6  – 10/9 – 10/13

<- Week 5

#### Refresh this page every time you arrive!  I update this daily!!!

If you have not already please join the REMIND for this class.

LAB 3 – Electrolysis of copper (II) Chloride is  Late!

_________________________________________                                                                                                                                   10/9 – Monday Columbus Day – “Indigenous People Day”

Columbus discovered America?  But he only made landfall in the Bahamas and Cuba?  Wait didn’t the Vikings make the voyage before he did?  Wait the Chinese mapped out the America’s 70 years before the Viking voyage?  Wait, didn’t native american Indian’s “discover” the America’s first?  Wait wasn’t the America’s already here?

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10/10 – Tuesday – A Day – 2/3a Lab, 4

Main focus
a) To identify galvanic corrosion and review alloys.
b)  Lab 4  – mole and unit cell calculations.

Period 2 ,4 –

1. alloys/ Galvanic Corrosion/ Statue of Liberty/ sacrificial anode.
2. Alloy Review, Homework review, calculation of atomic mass (grams per mole)!

Period 3a –

1. Lab 4  continues...

Alloy Presentation for class lesson:

1: Alloy introduction video : Stop at  23:00 (alloy lecture part)

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Lab 4 – The Metal Foil Lab

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

Conversion large number = small unit —–> small number = large unit

Lab 4- thickness of foils – 2017.pdf

Thin Foil Lab Instructions:

Study for TEST 1 – Wednesday –  10/11

Test 1 topics:  –
Please go back the appropriate worksheets, keys,and lectures in the past 3 weeks to review the following concepts
1.  Coloumbs Law:

No calculations with the formula but you should be aware how it applies to atoms ability to oxidize or reduce, solubility (why some ionic solids will dissolve in water while others do not or precipitate).

2.  Voltaic Cell/galvanic cell

Diagram, determining anode, cathode, charges, flow of electrons, salt bridge flow of ions, E0 calculation, use of reduction potential table,  writing balanced half reactions and overall reactions, predicting the voltage change when concentrations change (Le Chateliers Principle), molarity (M), predicting precipitates that would lower the molarity of certain ions when they become solids, voltage vs current.  Spontaneity and equilibrium, The U diagram.

3: Electrolytic Cell –

Diagram and label all parts with flow of charge from a power source.  Predict the products at each anode.   Calculating the moles, molarity, or grams of the products using total time, amperage and Faradays constant.
Determining E0 cell, half reactions, overall reaction, spontaneity.

Example 17.9 in Textbook gives 2 more problems with solutions

Electrolysis quiz Review Video is posted below:

4:  Unit Cell and alloys

Textbook: 10.6  – Lattice Structures

Basics of interstitial and substitutional alloys,  calculations using density, lattice constant and atomic radii with FCC or BCC.  Conversions, and use of Avogadros number.

There is no need to memorize the conversion factors (pm, nm) but you need to know what the FCC or BCC looks like and you should be able to figure out how many atom exist in each FCC or BCC. You should be able to complete all conversions of all the worksheet and Lab (4).

Example 10.15 in Textbook gives 4 more problems with solutions

Calculations of Close Cubic Packing Structures.pdf

Calculation with Close Packing structures Key p.pdf

Crystalline Unit Cell Problems.pdf

Crystalline unit cell problems key p.pdf

Here is a Link to Purdue University’s resources on Unit cell calculations:

5.  Review your 2 graded quizzes.  I have posted some blank quizzes.  *If you cannot print from your school computer, use your phone or another computer.

Electrolysis of quiz review:

Jump toWednesday Homework / top ______________________________________________                                                                                             10/11 – Wednesday – B Day – 2, 3b/4 Lab

Main focus
a) To Take Test 1 – Voltaic/Electrolytic Cells/Cubic cell calculations/alloys

b) To continue with Lab 4

Period 2 ,4 –

1. Complete Test 1 –

Period 3b –

1.  Lab 4 Continues

2. Complete Test 1 –

1Re-Study for TEST 1 –  version 2

I will grade, and return your graded test tomorrow morning. I will review the test in its entirety and YOU WILL TAKE ANOTHER Friday. Best OUT of 2!

I could not release the key because of the SAT people who will take the exam in class tomorrow.

IF you do not know how to do something today you should to review the skill from the previous resources posted.

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10/12 – Thursday – A Day – 2/3a Lab, 4

Main focus

a)  To Complete Lab 4  – mole and unit cell calculations – conclusion questions – 3b/4

b)  Test 1 (second version)- Voltaic/Electrolytic Cells/Cubic cell calculations/alloys

Period 2,4 –

1. Test 1 – Version 1 hand back and Review / Students that were out yesterday will take in Library

mean = 80.25

sd = 12.1

Period 4 –

1. Lab 4 – Metal Foils Lab continues OR  Mole concept and particle theory begins in class 1 –

1) G(r)eeks to John Dalton

2) Seeing atoms – Scanning Tunneling Electron Microscopy – (pizo electric crystal)

The need for a particle theory and mole theory.  They are deeply intertwined.

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.

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Lab 4 – The Metal Foil Lab

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

Conversion large number = small unit —–> small number = large unit

Lab 4- thickness of foils – 2017.pdf

Thin Foil Lab Instructions:

1. Review For Test 1 (second version tomorrow).  I have the a blank test and a key of the exam below:

I will also unlock the video below so that you can review the test.

2. Mole Concept/particle theory Officially begins: –  This Form is Due Tomorrow.

We have used mole concept and particle theory in our Amperage/Faraday calculations and in out unit cell calculations BUT we need to formally review and solidify these concepts to begin the Analytical/Stiochiometry part of the course.

A) Please view the lecture from MIT (Massachusetts Institute of Technology)

B) Please fill the form below based on the lecture:

3.  Complete the form below using the VERY Cool Mole videos below –

THIS FORM IS DUE MONDAY 10/16

Today’s Review of Test 1 – version 1:

AP Chemistry – Electrochemistry and Unit Cell Test Review – 22-23                                      AP Chemistry – Electrochemistry Test – Review 1819  – another video review

1a: MIT lecture Video

1b: MIT lecture Form:

2: Mole Concept video playlist for form below

Click on the upper left corner graphic that has the arrow to select the video you need.

2: Mole Concept Form: Based on above videos..
*Check the Key for next year for questions 8 and 12!

____________________________________________________________________                                      Jump toFriday Homework/top  10/13 – Friday – B Day – 2, 3b/4 Lab

Main focus

a) To retake Test 1 – (version 2)

b) To complete the Metal Foil Lab – (period 4)

Period 2,3b –

1. Retake TEST 1 – (version 2)

2.  Return LAB 1 AND 3 for conclusion revisions

Period 4 –

1.  Lab 4 – Metal Foil Lab – complete

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Lab 4 – The Metal Foil Lab

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

Conversion large number = small unit —–> small number = large unit

Lab 4- thickness of foils – 2017.pdf

Thin Foil Lab Instructions:

1.  Re-write conclusions for Lab 1 and or Lab 3.

Basic Lab Conclusion Guidelines:

The first paragraph – (Analysis of your objectives) – or section of your lab must parallel with your objectives.  In your objectives you told me what you were going to accomplish and now you must tell me what you actually found.  If you set out to do something and did not then points will be lost.  In this section you must write what you did according to your objectives. For instance in the 1st lab, we determined the experimental voltage of the Gerber cell and determines the accuracy of your results (percent error).   I want you to write what you obtained for these 2 objectives.  DO NOT WRITE A PROCEDURE ON HOW YOU DID THIS! This really a results section which summarizing the most pertinent data that you collected.  This is half of your conclusion.

In the second paragraph – (Error analysis) – of the conclusion, you must evaluate your experimental data through error analysis.  This requires thought and logical comments that supports your outcomes.  In the first lab you have a LARGE negative percent error and thus you need to list and explain errors that caused your experimental value to be under the theoretical value.   In this section you will use your numbers obtained experimentally to be your guide. You will describe all errors and tie them to your results. YOU NEED TO EXPLAIN HOW YOUR MEASURED VALUES ACTUALLY LED TO a lower value than the standard as was the case in Lab 1.  Be logical and concise.  You will only lose points if your explanation is not logical or if YOU ARE VAGUE!!!  This is analytical writing and thus no statements like, “I feel” or “I believe” should be used.

2.  Please view the Mole Concept Lecture below:

3.  Please complete the Mole Concept lecture Form below:

4.  Please Mole concept video form (posted under Thursday).

Particle / Mole Theory Presentation (used in video lecture below)

2 : Mole and Particle Concept Lecture :

3: Mole Concept Lecture Form:

END OF WEEK  6!