This is our second synthesis and one we’ll get to analyze a bit more!
You’ll get to do another extraction (careful of emulsions!) and learn another new technique to characterize your product: polarimetry.
Single Swap Rule
Hello awesome students,
Here are some links for you. These blogs, especially the first one, is an awesome resource. I have more blogs listed in the second page of the blog. You can reach it by clicking on the cyclohexane with the three lines (Menu) and then on the “Blogs to Look at” page.
Do’s and Don’ts
Post about Isomers (bonus cat references)
Also this. If you don’t look at anything else, look at this.
Favorite quotes: “Sometimes we’re going to come across questions where maybe we haven’t seen these reagents in exactly this combination before. You’re going to say to yourself, “Uggg! I swear, I have NEVER seen these reagents before. I have NO IDEA what Dr. [azmanam] is trying to do here!” And it may feel frustrating. But we’re going to be required to take those reagents, combine them with what information we already know, and do something new and unique with it.”
Also, it’s okay if you sometimes feel like this. Just as long as you keep doing this.
The next week will be filled with extractions, recrystallizations, and even one synthesis!
Here are some resources to use!
A great post that sums up extractions. Not everything is applicable, but it will give some good background on why we are doing certain things. Also, check out more of this blog! There’s stories of explosions, dead pigeons, and many hospital visits all while the author was under 18 in Communist-Poland.
What you don’t want to see…
Sublimation! (of ferrocene. your stuff should be white!)
Here are some resources for this week’s lab!
When things go wrong…
Vigreux Column (i.e. what we would use instead of copper sponges)
The World’s Longest Running Experiment
Here we come to our second way of determining purity of a substance /identifying what that substance is.*
TLC is extremely helpful and can be much faster than other ways of determining whether or not your product is pure or whether other side products have formed/starting material is still present.
Here’s some fun resources you can use!
It may look ugly, but pure it is!
Another way to look at it.
An experiment at home!
A lovely almost-but-not-quite exhaustive look at TLC. Check out those charts!
*What do you think the first way is?
Lab 2 is a two-lab session experiment although you should finish most of it on the first day.
A fun graph!
The posts for each experiment will mostly be a gathering ground for resources on each topic, although this could also include important points I want you to remember from the lab lecture.
This experiment deals with measuring melting points using the MelTemp and calibrating your thermometer. The first two resources explain some of the concepts from the lab which will be useful in your discussion. The third resource will be helpful when making your calibration graph.
Video on Melting Point
More Melting Point
How to do the calibration graph in Excel