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## Q1 : Week 5 – 10/2 – 10/6

<- Week 4

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

LAB 1 – Gerber Voltaic Cell is LATE!!!!!

LAB 2 – Voltaic Cell design is LATE!!!!!

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

______________________________________________________                                                   Jump toMonday Homework             10/2 – Monday – B Day2, 3b/4 Lab

Main focus –

a) To connect the concepts of electrolytic calculations with Lab 3 by determining the experimental mass of the Cu and comparing that result with the stoichiometric calculation.

b) Introduce the concepts of Molarity of the solution (in class using electrolytic cell calculations).

Period 2, 4:

1. Review previous assigned electrolytic cell Homework:

Molarity Formula:
Electrolytic cell – Molarity calculations Key p .pdf

Molarity Formula with a voltaic cell using electrolytic cell type calculations:                                             Intro Electrolytic Cells worksheet 2 key p.pdf                                                                                                                View Download

Electrolytic cell (electrolysis of water) &  voltaic cell with more vanilla electrolytic cell calculations:

Electrolysis of water – making the pure forms of the elements that combine to make water:

2H2O (l) + 2e   →    H2 (g)  +  2OH                       -0.83 volts

2H2O (l)   →     O2(g)  +  4H+  +  4e              -1.23 volts

E0 cell = -2.06 volts

—————1800————————1803————————–1831———————--1860———–

Voltaic Pile                  Humphrey Davis              Michael Faraday’s             Mole Concept                                                                                 created!                  electrolysis of water          Laws of electrolysis               created

2.  Review of Electrolytic Cell Extra Credit Quiz

Electrolytic cell quiz extra Credit Form KEY 1819.pdf

Period 3a –

1. Lab 3 : Determining the grams of copper from electrolysis –

a) Measure the mass of your filter paper and Copper – Data Collection
b) Calculate the grams of experimental copper.
c) Calculate the Theoretical grams of copper deposited at the cathode. This should have been done last week.
d) Calculate the Molarity of the solution assuming a 100.0 ml volume of solution was given.
e) Calculate percent Error.

f) Start your conclusion / HW

_______________________________________________________________________                                                                                                            Lab 3 – Electrolysis of copper (II) chloride

LAB  3  – Determine the grams of copper collected at the cathode of an electrolytic cell of an unknown concentration of copper (II) chloride–

a) Setup an electrolytic cell                                                                                                                        b)complete the lab diagram                                                                                                                                  c) collect and filter your copper                                                                                                                            d) place in the oven                                                                                                                                            e) Calculate the theoretical amount of grams of copper expected.                                                                          f) Determine experimental mass of copper.                                                                                                          g) Calculate percent error and Molarity of solution.

Lab 3 – Electrolysis of CuCl2.pdf

10/2 – Monday’s Homework: –

1. Please complete the Electrolytic Cell Form 2.  You will have 3 submissions tonight.

An excellent way to to review for tomorrows Electrolytic cell quiz!

2.  Period 3b/4 ONLY : should view the review video below to help write the conclusion.
Period 2a will work on this tomorrow night as we will need the lab period tomorrow to gather data.

1: Electrolytic Cell Form 2 :  This form is based in the information above. You have 3 submissions
tonight.

2: Electrolytic cell Lab – 3 of review:  Error Analysis

______________________________________________________________________________
10/3 – Tuesday – A Day – 2/3a Lab, 4

Main focus

a) To take the in class Electrolytic Cell Quiz.

b) To complete the Electrolytic cell Lab 3.

Period 2,4:

1. Review of Electrolytic Cell Form 2

Electrolytic cell Form 2 Key – 23-24 .pdf

2. Take the Electrolytic Cell quiz

Period 3a:

1. Lab 3 : Complete Lab by obtaining the experimental mass, Molarity, and Percent error.

2. Reviewed Errors and started the conclusion

1.  Please review the electrolytic cell quiz with the class lecture below:   It will be open today after all students take the quiz. I could not open up the video and key as there was several students who were absent today.

2. Please use the Unit cell Tutorial that is from NORTON.  I have a link below and you will need a username and password to enter. I have provided both below. If you cannot log into the tutorial please use my video posted below that will click you for you through the presentation. Please stop the video when needed.

The questions that the presents are written for you in the following worksheet.

Click on the link and click on the UNIT Cell Tutorial. Please Use FIREFOX or Chrome. Safari may have issues! (The link below worked for me today without a login.)
If you cannot access the clickable presentation please view the video I made of me going through the presentation.
I posted it below.
3.  Please complete the form below based on the UNIT Cell Tutorial in step 1.
You will have 3 submissions.

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

1:Electrolysis of quiz review:

2: Flash animation turned into a video :

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

3: Form on the Flash animation turned to video: You have 3 submissions for this form.

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

Main focus
a) To identify types of unit cells in Ionic and Metallic crystals (solids)

b) To perform unit cell calculations to determine, density, lattice constant, atomic mass, and atomic radius.

https://openstax.org/books/chemistry-2e/pages/10-6-lattice-structures-in-crystalline-solids

1. Electrolytic Quiz-  Self – Review in folders , quizzes –

2Ionic and metallic crystal lattice lesson –
X-ray crystallography – diffraction demo
cubic cell – video below

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 or a diffraction 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.
green laser
Passivity connections
Alloy – stainless steel

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

______________________________
Lab 4 – Thickness of Metal Foil Lab

LAB  4  The Metal Foil lab – 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

Unit cell for class:

Presentation for Class and Lab 4:

Today’s Lesson:

Lab 3 – Electrolysis of copper (II) chloride  is due Friday 10/6

The homework is different for each class tonight.
Period 2:

1.  Please complete question 1 on the Crystalline Unit Cell Problems.pdf  by following along with me in the video below. Only do question 1 on this worksheet.

Crystalline Unit Cell Problems.pdf

Crystalline unit cell problems key p.pdf

2.  Please complete question one from the Calculations of Close Cubic Packing Structures.pdf worksheet and review with the key.

Calculations of Close Cubic Packing Structures.pdf

Calculation with Close Packing structures Key p.pdf

Period 4:

1.  Please make another submission to last nights form. (You can have 1 more submission if needed!)

2.  Please complete question 1 of the  Crystalline Unit Cell Problems.pdf and review with the key.
I have posted a video below on this worksheet if needed.

Crystalline Unit Cell Problems.pdf

Crystalline unit cell problems key p.pdf

3.  Please complete question 2 of  from the Calculations of Close Cubic Packing Structures.pdf worksheet and review with the key.

Calculations of Close Cubic Packing Structures.pdf

Calculation with Close Packing structures Key p.pdf

2: Crystalline Unit Cell problems HW video : This will start at question 2!

__________________________________________________________
10/5 – Thursday – A Day – 2/3a Lab, 4

Main focus

a) To identify types of unit cells in Ionic and Metallic crystals (solids)

b) To perform unit cell calculations to determine, density, lattice constant, atomic           mass, and atomic radius.

c) To identify substitutional and interstitial alloys.

Period 2 ,4 –

1. Complete/Review classwork problems – Question 2 and 3 for both periods 2 , 4

Classwork:
Calculations of Close Cubic Packing Structures.pdf

Calculation with Close Packing structures Key p.pdf

2.  Alloy lesson – How adding different metals into a metal crystal will change the metals properties

Examples:  Steel, Stainless Steel (Cr prevents the oxidation of Fe )

Keep Galvanic Corrosion for the second day.. (get to the Alloys!)

Period 3a –

1. Lab 4 : Metal Foil Lab

______________________________
Lab 4 – Thickness of Metal Foil Lab

LAB  4  The Metal Foil lab – Determine the number of atoms high a copper foil and aluminum foil are using volume, density and unit cell calculations.

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:

Alloy Presentation for class lesson:

1. Please complete questions 2, and 3 of the Crystalline Unit Cell Problems.pdf and review with the key. Feel free to use the video to help review these questions.

*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

2. Please view the lecture (first 23 minutes only) and complete the Alloy worksheet.pdf worksheet and review with the key.

Alloy worksheet.pdf

2: Crystalline Unit Cell problems HW video : This will start at question 2!

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

Jump toFriday Homework/top         __________________________________________________________________                                                                                                           10/6 – Friday – B Day – 2, 3b/4 Lab

Main focus

a) To complete Unit cell calculations: Density, atomic radius, and atomic mass

b) To review alloys (substitutional & interstitial) and introduce galvanic corrosion

c)  To continue with lab 4  – mole and unit cell calculations

Textbook: 10.6  – Lattice Structures

Period 2 ,4 –

1. Unit Cell Homework review – Question 2 & 3

2. Alloy discussion – Substitutional vs. Interstitial
alloys / Galvanic Corrosion

Steel, Brass, Bronze,
Statue of Liberty
electrodes on boats

Homework:

Crystalline unit cell problems key p.pdf

Period 3b:

1.  Lab 4 – Metal Foil Lab Continues

Alloy Presentation for class lesson:

_______________________
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