Instructional Video2:57
Professor Dave Explains

Carbon: The Element of Life

9th - Higher Ed
You may have heard that carbon is the element of life. What does that mean? Let's find out!
Instructional Video3:00
Professor Dave Explains

Will Synthetic Vitamins Make Me Explode?

9th - Higher Ed
The words natural and synthetic are thrown around a lot these days, when talking about foods, medicine, and other things. But what do they really mean, and how are they different? Is one necessarily better than the other? Can the...
Instructional Video7:40
Professor Dave Explains

Why You Should Never Say "It's Just A Theory"

9th - Higher Ed
A portion of our culture distrusts the scientific method, assuming that there are transcendent truths unknowable by science. But nothing is truly out of bounds for science. If it's real, it can be studied, and tested. Perhaps the...
Instructional Video2:56
Professor Dave Explains

Practice Problems: Labeling Carbons

9th - Higher Ed
What's with this hierarchy? Primary, secondary, tertiary... can't all carbons be equal? Well, no. We need to be able to label the degree of substitution of any carbon in an organic molecule so that we can make predictions about the...
Instructional Video5:18
Professor Dave Explains

Practice Problem: Types of Protons

9th - Higher Ed
We learned about how pairs of protons can have specific relationships. They can be homotopic, enantiotopic, diastereotopic, or heterotopic. Let's apply this to some examples!
Instructional Video2:12
Professor Dave Explains

Practice Problem: Mechanism - Reaction of an Epoxide

9th - Higher Ed
For this one we will have to know what epoxides do! It's a pretty neat little mechanism.
Instructional Video2:59
Professor Dave Explains

Practice Problem: Electrophilic Aromatic Substitution Retrosynthesis

9th - Higher Ed
You gotta know your EAS reactions for this one! Make sure you do them in the right order, too.
Instructional Video4:26
Professor Dave Explains

Practice Problem: Conversion of trans-2-butene to cis-2-butene

9th - Higher Ed
How can we go from one type of alkene to another? In three steps precisely? Use the reactions you know and figure it out! (Hint: Think about addition reactions, elimination reactions, and hydrogenations!)
Instructional Video3:04
Professor Dave Explains

Practice Problem: Reducing Agents

9th - Higher Ed
For this one we need to know the ability of different reducing agents to react with various functional groups.
Instructional Video5:41
Professor Dave Explains

No, You're Not Left-Brained or Right-Brained

9th - Higher Ed
Everyone has heard of the idea that some of us are "left-brained", meaning more analytical or mathematical in thinking, while some of us are "right-brained", meaning we are more creative or artistic. Here's the thing: It's rubbish! The...
Instructional Video2:45
Professor Dave Explains

Practice Problem: Mechanism - Acid Catalysis

9th - Higher Ed
For this one we need to know what happens to alcohols under acidic conditions. Beware of tricky carbocations!
Instructional Video2:46
Professor Dave Explains

Practice Problem: Site of Protonation on a Weak Base

9th - Higher Ed
For this one we will need to understand the basics about Bronsted-Lowry acid-base reactions, and we also should be able to gauge the stability of various potential conjugate bases.
Instructional Video3:50
Professor Dave Explains

Practice Problem: Electrophilic Aromatic Substitution Rates

9th - Higher Ed
We know about the products of these reactions, but how fast do they go? Give these a shot.
Instructional Video4:51
Professor Dave Explains

Practice Problem: E2 on Cyclic Systems and Cyclohexane Chairs

9th - Higher Ed
For this one we will want to recall some of the rules about doing E2 on a cyclohexane ring, as well as the relative stabilities of cyclohexane chairs. Combining concepts! Predicting kinetics!
Instructional Video3:14
Professor Dave Explains

Practice Problem: Analyzing Acid-Base Equilibria

9th - Higher Ed
Acids! Bases! Conjugate acids! Conjugate bases! We definitely have to be able to label such things, and we should also know how to state which direction in an acid-base equilibrium is preferred. To do this we should know how to tell...
Instructional Video4:14
Professor Dave Explains

Practice Problem: Ozonolysis Reactions

9th - Higher Ed
Ozone isn't just for shielding us from harmful UV radiation! It's a handy-dandy synthetic tool. Try these on for size.
Instructional Video4:02
Professor Dave Explains

Practice Problem: One-Dimensional Two-Body Problem

9th - Higher Ed
Lisa is moving again already! I dunno, I think there were bedbugs. This time you have a different plan, but you will still need kinematics and Newton's laws to find out how much time and effort stand between you and more snacks. Give it...
Instructional Video4:16
Professor Dave Explains

Practice Problem: Energy Diagrams

9th - Higher Ed
For this one we need to understand what the different parameters on an energy diagram correspond to. Check out my tutorial on this subject in the general chemistry playlist if it seems fuzzy!
Instructional Video6:20
Professor Dave Explains

Practice-Problem: Three-Reaction Pathway

9th - Higher Ed
We've got a starting material, and we are subjecting it to a series of three reaction conditions. What do we get? See if you can find out!
Instructional Video4:36
Professor Dave Explains

Practice Problem: Hydrogenation, Isomerism, and Cyclohexane Chairs

9th - Higher Ed
For this one we need to understand the stereospecificity of hydrogenation over platinum metal, stereochemical relationships, and the relative stability of cyclohexane chair conformations.
Instructional Video5:07
Professor Dave Explains

Practice Problem: Grignard Reactions

9th - Higher Ed
Grignards are all over the place! Better make sure we can draw the correct products of Grignard reactions. Try these for practice.
Instructional Video4:27
Professor Dave Explains

Practice Problem: Four-Reaction Pathway

9th - Higher Ed
We are starting with benzene, we do four reactions, and what do we get? See if you can get the right answer!
Instructional Video6:47
Professor Dave Explains

Practice Problem: Crossed Aldol Products

9th - Higher Ed
Enolate chemistry is tricky business! You might get more products than you think. Give this one a shot.
Instructional Video3:31
Professor Dave Explains

Practice Problem: Synthetic Strategy

9th - Higher Ed
We've got starting material and we've got a target molecule, and we've gotta figure out how to make the transformation in just two steps. Sift through that bag of synthetic tricks!