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Archive – week 4 – 19-20

Week of 9/23 – 9/27

9/23 – Monday – period 2
2. Electrolysis of water Demo and Notes
3.Lab 3 : Determining the grams of copper from electrolysis –

Measure the mass of your filter paper and Copper – Data Collection
Calculate grams of experimental copper.
Calculate percent Error.

Lab 3 – Electrolysis of CuCl2.pdf

period 3/4-

1. Electrolytic Cell Form Review
2. Calculate concentration needed for the lab – Homework review
Electrolytic cell – Molarity calculations Key p .pdf

4.  Complete more of the last Friday’s Recent Voltaic Cell AP Test Questions .pdf packet
(Finish question 3)

Recent Voltaic Cell AP Test Questions .pdf

5. Electrolysis of water Demo and Notes
6  Lab 3 : Determining the grams of copper from electrolysis –

Measure the mass of your filter paper and Copper – Data Collection
Calculate grams of experimental copper.
Calculate percent Error.
Today’s Demo: (electrolysis of water)

Another explanation a few years ago..
9/23 – Monday – Homework – Surprise Quiz on Electrolytic Cells Wednesday

1. Complete and review the following worksheet with the key and/or Video below:

Electrolytic Problems Expanded.pdf

Electrolytic Problems Expanded key p.pdf

2. Start reviewing your electrolytic cell worksheets.  A quiz is coming soon!

Electrolytic Problems Expanded worksheet Review Video:

End of Monday!

9/24 – Tuesday – period 2/3

1. Electrolytic Cell Form Review
2. Calculate concentration needed for the lab – Homework review

Electrolytic cell – Molarity calculations Key p .pdf
3. Lab 3 : Determining the grams of copper from electrolysis
– Mass of Cu deposited on cathode measured = experimental value
– Theoretical mass of Cu from average amperage calculated
– percent error
– Determination of the Molarity (assuming if the reaction went to completion).
– Errors
– period 4
1. Electrolytic Cell Form Review
2. Calculate concentration needed for the lab – Homework review
Lab 3 – Electrolysis of CuCl2.pdf

Today’s Classwork:

The Form is based on this file:
Electrolytic cell quiz extra Credit Form 1819.pdf
Extra Credit Form:

#### Electrolytic Cell Extra Credit Form 1920

About the Microbial Electrolytic Cell in the Form above:
Natural gas has a dominant role in our energy supply. However, most of our natural gas is of fossil origin and therefore it is of utmost importance to have a renewable source of natural gas. Currently, the only renewable alternative to natural gas of fossil origin is to produce natural gas from biomass, e.g. organic waste, and crops. This alternative is of limited use, however, as land, water, and fertilizer, needed to produce the required biomass, are scarce and its use may not compete with food production. Here we propose a new technology that is capable of converting (excess) electricity and CO2 into methane (CH4), the main component of natural gas.

The points given back on the last electrolytic cell quiz will be determined the following:

 Raw score 13 12 11 10 9 8 7 6 5 4 *Bonus Points 10 9 8 7 6 5 4 3 2 1
*So you need to get at least 4 correct answers (out of 13) to get 1 Bonus Point.  If you got 13/13 you earned the max point = 10 points.

*If you do not need these point for the electrolytic cell quiz then you can keep them for another quiz.

9/24 – Tuesday – Homework:  Study for surprise quiz tomorrow 🙂

1.  Complete the Conclusion for Lab 3 – Completed Lab due Thursday.

2.  Study for the electrolytic quiz (with voltaic!)

The important worksheets in review:
Intro Electrolytic Cells worksheet 1 .pdf

Intro Electrolytic Cells worksheet 1 Key.pdf
Stiochiometry 8 redox electrolytic – 1999.pdf

Stiochiometry 8 redox electrolytic KEY – 1999.pdf
Electrolytic cell – Molarity calculations Key p .pdf
Electrolytic cell – Molarity calculations .pdf
With Voltaic/galvanic
Intro Electrolytic Cells worksheet 2.pdf

Intro Electrolytic Cells worksheet 2 key p.pdf

Electrolytic Problems Expanded.pdf

Electrolytic Problems Expanded key p.pdf

JUST RELEASED:  The First bendable battery

9/25 – Wednesday – period 2

1. Voltaic cell / electrolytic cell quiz

period 3/ 4

1.  Voltaic cell / electrolytic cell quiz

2.  Lab 3 – Error analysis

3.  Begin Metal Foil Lab –

Discussed the volume unit relatives cm3 = ml and the conversions of m3 to cm3
metric 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

9/25 – Wednesday –  Homework:

1. Complete your conclusion to Lab 3. The entire lab is due Friday 9/27.

Lattice Arrangement – Cubic cells.pdf  (this is a hard copy of the form which was given out today)
2: Please watch the flash animation from the Link Below (UNIT CELL TUTORIAL) and do the questions at the end of the tutorial.   (they provide answers and solutions). This tutorial will be very helpful for tomorrow’s Lab activity.

Lattice Arrangement – Cubic cells.pdf  (this is a hard copy of the form which was given out today)
Click on the link and click on the UNIT Cell Tutorial.
Please Use FIREFOX or Chrome. Safari may have issues!
grodskib@whbschools.org
Lexington1
3:  Please complete the form below based on the UNIT Cell Tutorial in step 1.

You will have 2 submissions BUT they will be in one night.  The first submission is due by 10:00. The form will be on autograde for your first submission AND then after 10:00 autograde will be turned off so if you want to get feedback before your second submission you must submit before 10:00.

YOU HAVE UNTIL 10:00 PM tonight for your 1st submission!  After 10:00 I undo autograde feature.

Please use this video to complete the Lattice Energy Form if you could not connect to the tutorial above:

#### Lattice arrangements and Calculations 1920

End of Wednesday..

9/26 – Thursday  – period 2/3 –
1. Review electrolytic. voltaic cell quiz
2.  Homework review

DiFFraction of light demo – double slit experiment = green laser
Constructive and destructive interference patterns
These patterns can be observed to measure the distance of the 2 slits or the distance between openings in a crystal.

 The following is an example of an interference pattern that occurred during today’s demo.  This is the famous double slit experiment that proves light has wave properties.I pointed a green laser at a card that had 2 small double slits.   The bright spots are the constructive interference while the space between the dots are destructive  interference.  Based on some measured values and Bragg’s Law we can calculate the distance between the slits that the light passed through AND this is what is done to measure the distance of the lattice constant from metal crystals in x-ray crystallography.
Passivity connections
Alloy – stainless steel

Key to last nights form:
Lattice arrangement Form – Cubic Cells key p.pdf

3:  Start the classwork worksheet – Calculations of Close Cubic Packing Structures.pdf

Classwork:
Calculations of Close Cubic Packing Structures.pdf

Calculation with Close Packing structures Key p.pdf

4.  Begin Metal Foil Lab – did not start..

Discussed the volume unit relatives cm3 = ml and the conversions of m3 to cm3
metric 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

period 4 –

1. Review electrolytic. voltaic cell quiz
2.  Homework review

Key to last nights form:
Lattice arrangement Form – Cubic Cells key p.pdf
DifFraction of light demo – double slit experiment = green laser
Constructive and destructive interference patterns
These patterns can be observed to measure the distance of the 2 slits or the distance between openings in a crystal.
Passivity connections
Alloy – stainless steel
Class movie:

Todays complete review of the Electrolytic Cell Quiz (key is posted in powerschool):

9/26 – Thursday  – Homework:
1:  Please complete the Alloy worksheet.pdf worksheet and review with the key.

Alloy worksheet.pdf

Alloy worksheet key.pdf

2:  Please complete the Crystalline Unit Cell Problems.pdf and review with the key.
I have posted a video below on this worksheet if needed.

Period 2 students please complete all questions.
Period 4 students please do all questions EXCEPT QUESTION 2!

*Be for-warned that in my video FOR QUESTION 2, I did not have my calculator in degrees so my final answer to 2 is a bit off because I have the sin 45 to be .8509 when it should be .707.  The handwritten key is correct. IN spite of me you can learn!

My key below is correct for question 2.

Crystalline Unit Cell Problems.pdf

Crystalline unit cell problems key p.pdf

A more detailed review of the electrolytic cell quiz:

End of Thursday..

9/27 – Friday  – period 2

1: alloys/ Galvanic Corrosion
2. Alloy Review, Homework review, calculation of lattice constant (radius)

3: Lab 4 – Metal foil lab
Lab 4- thickness of foils – 2017.pdf

period 3/4

Start the classwork worksheet – Calculations of Close Cubic Packing Structures.pdf

Classwork:
Calculations of Close Cubic Packing Structures.pdf

Calculation with Close Packing structures Key p.pdf
1: alloys/ Galvanic Corrosion
2. Alloy Review, Last question of worksheet Calculation with Close Packing structures Key

3: Lab 4 – Metal foil lab

#### Alloys

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.

This site might be very helpful in your completion of the lab.
Metal foil Lab:

#### Thin Foil Lab

9/27 – Friday 4 day – WEEKEND – Homework:  (3 parts!)
1.  Complete/redo the classwork problems we started this week with cubic cell structures.

Classwork:
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

2:  Study for TEST 1 – Thursday 10/3 – I want to complete Lab 4 first.

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 preciptate).

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,

4:  Unit Cell and alloys

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

There is no need to memorize the conversion factors (pm, nm) or what the FCC or BCC looks like but 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).

5.  Review your 2 graded quizzes. They keys are posted in the powerschool. I have posted some blank quizzes

*If you cannot print from your school computer, use your phone or another computer.

*If you cannot print from your school computer, use your phone or another computer.
 Blank Quiz Quiz Key Voltaic Cell Quiz .pdf Voltaic Cell Quiz Key p.pdf Voltaic Cell Quiz retake.pdfView Download Voltaic Cell Quiz retake key p.pdfView Download Electrolytic cell quiz .pdf Electrolytic cell quiz key p.pdf

3:  Mole Concept/particle theory Officially begins:

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:

#### Atomic Structure

Lecture from MIT (Massachusetts Institute of Technology):

Form for MIT Lecture:

End of week 4!