The labs linked below are in .pdf format. You should download and read these well in advance of the scheduled lab activity.
To save paper, I recommend printing only the pages you will be handing in for credit.
You are welcome to use an electronic format in lab to read the instructions for the procedure.
This must be completed to work in lab.
Be certain to adhere to the rules it describes, including shoes, clothing, and eye protection.
Watch these few videos with advice for this experiment.
Filling the graduate cylinder completely with water (NO bubbles initially)
Reading the grad cylinder volume at the right water level, so that P(inside) = P(atmosphere)
In addition to the prelab, complete all of the mole and limiting reactant calculations
in the blue highlighted section of the data sheet.
Success with this lab requires careful attention to detail: compound formulas, ion charges, and phases (s, l, g, aq)
Charges on all separate ions! NO CHARGES on compounds or things that are not ions.
Be sure and watch the two videos here: heating a sample in a t-tube and lighting a Bunsen burner
Prelab hints:
#2 BaCrO4 is an insoluble solid. See Sec 8.6 for what this question is asking.
#3 Benzoic acid (C6H5CO2H) is a weak acid. Leave it undissociated in your net ionic equation.
Lewis dot, resonance, formal charges, and VSEPR shape (Sec 5.1-5.5 and Sec 5.7-5.9)
Video 5.1 Lewis dot rules (13:05)
Video 5.2 Resonance (6:02)
Video 5.3 Electronegativity and polar bonds (7:08)
Video 5.4 Formal charges (13:31)
Video 5.5 VSEPR shapes of molecules (14:43)
3 things (1:12) 4 things (3:30) 5 things (3:33) 6 things (3:32)
Valence bond orbital hybridization Sec 6.2-6.3
Video 6.1 Bonds orbital overlap sigma bonding (8:23)
Video 6.2 sp2 hybridization pi bond off-axis overlap (5:52)
Video 6.3 sp3d sp3d2 (6:48)
The PRELAB is one of the pages in the downloaded file.
This lab uses your cell phone as the computer to interface with our small Bluetooth spectrometers. To make this work, you must first download the Spectral Analysis app (for Android or iPhone) from Vernier. Once installed you should be able to open the software, although no spectrometer will be connected until lab. A spectral file is posted here for testing with the software on your phone. Open it by CHOOSING this file in the home window of the software.
This file gives instructions on using the Bluetooth spectrometer with phone.
This is a great video illustrating the emission of light by gaseous atoms.
You will need access to Excel, Google Sheets or other similar X,Y data plotting software to complete this lab.
All current UCA students can download copies of MS Office (including Excel) paid by their tuition.
You will need this copy of the H emission spectrum to complete today's lab.
Watch these before coming to lab:
The PRELAB is one of the pages in the downloadable file. This is due when you first walk into lab.
This video summarizes significant figures and how these will matter in lab.
A working copy of Excel will help for this lab. Desrochers spreadsheet advice for this lab.
Information about how density is used to recycle plastics.
A working copy of Excel will help for this lab.
Watch this before coming to lab:
Before coming to lab, calculate the molar mass of MgSO4 , SrCl2, and ZnSO4 with as many significant figures as you can find.
You are encouraged to watch this video on lighting and operating a Bunsen burner.
Also watch this video on manipulating the ceramic crucible on the clay triangle.
Radioactivity is a natural part of the world.
I am excited about trying this.