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## Week 6 – 10/4 – 10/8

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10/4 – Monday – A Day – 2, 3a Lab/4

Main focus
a) To identify galvanic corrosion and review alloys

b)  Begin lab 4  – mole and unit cell calculations

1: alloys/ Galvanic Corrosion
2. Alloy Review, Homework review, calculation of atomic mass (grams per mo,e)

Homework:

Crystalline unit cell problems key p.pdf

Electrolysis of water demo :

Galvanic Cell and Alloy Presentation for class lesson:

2/3a 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

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10/4 – Monday Homework: –

Crystalline Unit Cell Problems.pdf

Crystalline unit cell problems key p.pdf

2:  Study for TEST 1 – Wednesday or Thursday this week – I want to complete Lab 4 first.
Materials – Posted last Friday
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:

<iframe width=”560″ height=”315″ src=”https://www.youtube.com/embed/dxR06Mi8ExI” title=”YouTube video player” frameborder=”0″ allow=”accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture” allowfullscreen></iframe>

MIT Video :

MIT lecture Form:

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10/5 – Tuesday – B Day – 2, 3b Lab/4

Main focus –
a)  To Complete Lab 4  – mole and unit cell calculations

3b/4 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

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10/5 – Tuesday Homework: –

1:  Study for TEST 1 – Tomorrow !!!!
2:  Lab 3 is due!

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,

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 Avogadros 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.

 Blank Quiz Quiz Key Voltaic Cell Quiz .pdf Voltaic Cell Quiz Key p.pdf Voltaic Cell Quiz retake.pdfViewDownload Voltaic Cell Quiz retake key p.pdfViewDownload Electrolytic cell quiz .pdf Electrolytic cell quiz key p.pdf

Lab 3 Electrolytic Cell Review Video (errors) :

End Of Tuesday!

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10/6 – Wednesday – A Day – 2/3a Lab, 4

Main focus –
a)  To Complete Lab 4  – mole and unit cell calculations – conclusion questions – 2/3a

b)  Test 1 – Voltaic/Electrolytic Cells/Cubic cell calculations/alloys

Period 2 : Complete Lab 4

Period 3/4 : Test 1 !

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10/6 – Wednesday Homework: –

1.  Complete the form below using the VERY Cool Mole videos below: ( 2 submissions only!)

The playlist of all the videos needed id posted below.
Click on the upper left corner graphic that has the arrow to select the video you need.

Mole Concept video playlist for form below:

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

End Of Wednesday!

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10/7 – Thursday – B Day – 2, 3b/4 Lab

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

b)  Test 1 – Voltaic/Electrolytic Cells/Cubic cell calculations/alloys

Period 2 :

a) 15 minutes to finish Test 1 –

b) Mole concept and particle theory begins in class 1 –

Period 3/4

a) 15 minutes to finish Test 1 –

b) Mole concept and particle theory begins in class 1 –

1) Return of Monday’s Form – Scientists – MIT Lecture                                                                                                                                                    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.

Particle / Mole Theory Presentation:

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10/7 – Thursday Homework: –

1:  Re-Study for TEST 1 – Tomorrow !!!!
I will grade, scan and email you your first attempt on this test by this afternoon. I will have the key linked in                        Powerschool.  I will also unlock the video below so that you can review the test.

2:  Lab 3 and 4 are due!

Review of Test 1:

###### End of Thursday!

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10/8 – Friday – A Day – 2/3a Lab, 4

Main focus –
a) To Continue with particle and mole theory – 2/3a,4

b) Test 2 – Voltaic/Electrolytic Cells/Cubic cell calculations/alloys

Period 2/3 :

a) Test 1 – makeup – best out of 2

b) Mole concept and particle theory continues in class 1 –

Period 4

a) Test 1 – makeup

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10/8 – Friday Homework: –

1:  The homework is very light this weekend.

THERE IS NO HOMEWORK

End of week 6!