Wednesday Lab Final

I am 99.9% confident that we will have our lab final in the Science Center in room 333, which is in the Geology Department. I have a doctor's appt this morning and will be in my office as soon as possible, probably around noon. Feel free to come by then for me to check your notebook before the final.

If for some reason the room number changes, I'll post this information. Sorry for the delay and confusion.

Chromatography

Here are our notes on Chromatography.

Principles of Chromatography

Pine Cone Flame Colors

Some of you asked about how to make pine cones that will color a fireplace flame, here is a good link:

How to Color Fire

You might find more references by googling "Pine Cone Flame Emission." Let me know how it turns out if you try it.

Molecular Spectroscopy

In Chapter 19, we'll only cover sections 4 and 5.

Molecular Spectroscopy

Atomic Spectroscopy

Here are the notes for Atomic Spectroscopy

Atomic Spectroscopy

These are demos of things we'll be discussing.

Young's Double Slit Experiment

Flame test

Review to be rescheduled

I'm home today with a sick child, so I'll have to reschedule our lab review session. I will have our new notes and next week's lab posted on Monday.

Lab Math Review

I'll be in SCIC 317 tomorrow (Friday) at 12:00 to go over any math errors from lab, if you want to check any results and resubmit. Please be on time and/or let me know if you plan to attend, if no one shows up at noon I won't stick around. Thanks!

Properties of Light

We're skipping Chapters 16 and 17. Chapter 16 covers Redox titrations, and we have already done several of these in lab. Chapter 17 covers instrumental methods, which (some of) you will cover in Instrumental Analysis.

So we've moving on to Chapter 18, Let There Be Light.

Properties of Light

Electrode Measurements

Notes for Chapter 15:


Electrode Measurements

Electrode Potentials

Here are the notes for Chapter 14, Electrode Potentials.

Electrode Potentials

update

Our next topic will be Chapter 14, Electrode Potentials. The notes for this chapter will be posted on Wednesday morning after fall break.

Have a great break and be safe.

A Deeper Look at Equilibria

Here are the notes for Chapter 12, sections 1-3.

A Deeper Look at Chemical Equilibrium

EDTA in Simpson case

Here's a link to an article in the journal Analytical Chemistry concerning the EDTA evidence we discussed in class, if you are interested.

Determining EDTA in Blood

EDTA titrations

Here are the notes for Chapter 13. We'll skip section 13-5 for now.

EDTA titrations

update

Our next topic will be chapter 13, EDTA titrations. We'll come back to chapter 12 later. The notes will be posted on Monday. Homework for Chapters 10 and 11 is posted outside my office. Don't forget Quiz 5 on Tuesday.

Have a great weekend.

Chapters 10, 11 - Acid/Base Titrations

Here are the notes for Chapters 10 and 11 - Acid Base titrations and Polyprotic Acids/Bases. We'll be building on our work in Chapters 8 and 9, so be sure to keep up with the homework.


Acid/Base titrations

update

Next week's notes and lab will be posted on Monday. Have a great weekend.

Buffers - Chapter 9

Here are the notes for Buffers. We'll be doing a lot of problem-solving, building on the work we did in chapter 8. Be sure you are keeping up with the homework.

Buffers

Acid/Base Chemistry - Introduction

Chapter 8 is a review of introductory acid/base chemistry. Here are the notes.

Acids and Bases

Gravimetry and Combustion Analysis

We'll start these notes on Thursday, but they won't be on Test 1 (September 18).

Gravimetry and Combustion Notes

Crystallize your own rock candy.

Thymol Blue

Here is the conversion of diprotic thymol blue indicator to monoprotic, which happens at pH 1.7. You can see that the conjugation changes during this conversion.

You can see the color change at different pH levels below.

Titrations

The last topic before Test 1 is titrations. Here's the notes:

Titration Notes

Look out! There's an air bubble.

Error Analysis and Statistics

Our next topic is Error Analysis and Statistics, here is the note set:

Error Analysis Notes

Here are some links to more info about things we are discussing:

Radiocarbon Dating the Shroud of Turin

Occurrence of Mercury in Saltwater Fish

1908 article by "student" introducing the t-test

Wikipedia entry for William Sealy Gosset, aka "student"

Quiz on Tuesday

We'll have our first quiz at the beginning of class tomorrow. After that, we'll finish up our notes on Equilibrium. The new set of notes will be posted after tomorrow's class.

Oxidation-Reduction Reactions (Redox)

Here's a refresher on the rules for Redox reactions (see number 7 on Getting Started worksheet).

1. Each atom in a pure element has an oxidation number of zero. Example: Mg(solid), O2(diatomic oxygen)

2. For ions consisting of a single atom, the oxidation number is equal to the charge on the ion. Example: Ca2+, Cl-

3. Fluorine is always -1 in compounds with other elements.

4. The oxidation number of H is +1 and of O is -2 in most compounds.

5. Cl, Br, and I are always -1 in compounds (except when combined with oxygen and fluorine.)

6. The algebraic sum of the oxidation numbers in a neutral compound must be zero; in a polyatomic ion, the sum must be equal to the ion charge. Example: NaCl (Na is +1, Cl is -1), OCl- (O is +2, so Cl is -3 to get overall charge of -1).

Group one metals are +1, group two metals are +2.

Transition metals can have different oxidation numbers, no rule of thumb. Example: Fe +2, Fe +3

There may be exceptions to some of these rules, but for our class, this is what you need to know. We will get back to Redox reactions when we cover Electrochemistry later this semester.

Here's a link for some more practice:
Oxidation Numbers

comment on Getting Started worksheet

I have the wrong course numbers for General Chemistry on our worksheet. CHEM 111/111L is first semester Gen Chem, and CHEM 112/112L is second semester Gen Chem. Of course, if you took honors chemistry first semester, the number was CHEM 153/153L. Feel free to correct my mistake on the worksheet, sorry for any confusion.

Equilibrium Notes

Our next topic is equilibrium.

Equilibrium Notes

First Day Notes and Worksheet

Here is the set out notes given out on the first day of class:

Tools of the Trade notes

And here is the worksheet - turn it in before class on Thursday Aug 23 for +5 on your first test.

Getting Started worksheet

Getting Started

Feel free to leave a comment here if you want to make sure you understand the process.