Q1 : Week 5 – 9/28 – 9/30
Jump to: Wednesday, Thursday, Friday
Refresh this page every time you arrive!
If you have not already please join the REMIND for this class.
________________________________________________________________________________
9/28 – Wednesday – A Day – 2/3a Lab, 4 Jump to: Wednesday Homework
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).
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
Electrolytic Problems Expanded key p.pdf View Download
2. Review of Electrolytic Cell Extra Credit Quiz
Electrolytic cell quiz extra Credit Form KEY 1819.pdf
View Download
Period 3a –
1. Lab 3 : Determining the grams of copper from electrolysis –
f) Start your conclusion / HW
______________________________________________
9/28 – Wednesday Homework: –
2. Period 3a Lab should view the review video below to help write the conclusion.
2: Electrolytic cell Lab – 3 of review: Error Analysis
Jump to: Thursday Homework
_______________________________________________________________________________________________________________________________________
9/29 – Thursday – B Day – 2, 3b/4 Lab
b) To complete the Electrolytic cell Lab 3.
1. Lab 3 : Determining the grams of copper from electrolysis –
______________________
9/29 – Thursday Homework: –
View Download
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:
End of Thursday!
._______________________________________________________________________________________________________________________________
9/30 – Friday – A Day – 2/3a Lab, 4 Jump to: Friday Homework
b) To perform unit cell calculations to determine, density, lattice constant, atomic mass, and atomic radius.
Diffraction of light demo – double slit experiment = green laser
![]() |
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. |
View Download
View Downloa
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
Unit cell for class:
Presentation for Class and Lab 4:
Today’s Lesson:
__________________________________________________
9/30 – Friday’s Homework: –
Lab 3 is due Monday 10/3 in the crate!
View Download
View Download
2: Crystalline Unit Cell problems HW video :
End of week 5!