Reactions and Stoichiometry in MCAT Chemistry

Stoichiometry & Reactions SquareThis Tutorial Video Series will guide you through the content you need to master for MCAT Chemistry Stoichiometry and Reactions. This series will help you master AAMC Content Category 4E!

This series includes everything from basic overviews of molecules and calculations, to advanced reactions, balancing and more.

You’ll also learn the most important aspect, the math and shortcuts behind this topic. Still rusty? Start with the MCAT Math Without A Calculator and MCAT Conversions tutorial series.

It will cover everything from terminology, step by step explanations, and practice problems!

Don’t forget to grab your free copy of my Strong Acid/Base Mini Cheat Sheet here to help with your memorization.

My Stoichiometry & Reactions Practice Quiz will be coming soon!

Video 1: Intro to Reactions & Stoichiometry

Stoichiometry & Reactions 1 playStart with a quick overview of key terms and concepts to build a proper foundation for the remainder of this series.

If you don’t understand the terms, you’ll have trouble with the related math.  Can’t skip this one!

Video 2: Calculating Molecular Weight and Formula Weight

Stoichiometry & Reactions 2 playThis video will show you how to find molecular weight in AMU, grams per mole, formula weight conversions, and more.

Best of all, you’ll learn how to do this QUICKLY,

Despite not being allowed to use a Calculator on the MCAT.

Video 3: Empirical Formula and Molecular Formula Calculations

Stoichiometry & Reactions 3 play This video explains the definitions, similarities, and differences between an atom’s empirical formula and its molecular formula.

You’ll also learn how to calculate each with simple and easy-to-apply logic.

Video 4: Molarity, Molality, and Molar Mass

Stoichiometry & Reactions 4 playLearn the definitions, calculations, and how the difference between molarity and molality.

Also learn a time saving shortcut to quickly interconvert between molarity and molality on the MCAT.

Video 5: Percent By Mass Composition

Stoichiometry & Reactions 5 playLearn ONE rule for all these types of questions!

This video makes this concept simple. You’ll see WHY and HOW these equations work, instead of memorizing all the different percent formulas.

Video 6: Mole and Avogadro’s Number

Stoichiometry & Reactions 6 playThis video covers the definition of Moles as well as an illustration showing the logic of moles in general chemistry.

You’ll also see how to easily and quickly convert from and to them and other units on the MCAT!

Video 7: Density

Stoichiometry & Reactions 7 play This video covers the definition in Chemistry vs in Physics, the logic behind the equations, and step-by-step solutions to practice problems!



Video 8: Oxidation Numbers

Calculating Oxidation Number in MCAT General Chemistry by Leah Fisch

Learn what they are, how to find them on simple molecules/ions, and how to calculate oxidation numbers for atoms in complex molecules and polyatomic ions.


Video 9: Redox and agents

Redox Pairs and Common Oxidizing and Reducing Agents in MCAT General Chemistry by Leah4sci

This video walks you through the concept of redox pairs using the mnemonic “LEO the lion says GER” and how to recognize oxidizing vs reducing agents by looking for the presence of oxygen and hydrogen. You’ll also learn (not just memorize) how to recognize and remember some of the common oxidizing and reducing agents that will show up on your MCAT.

Video 10: Conventions for Writing Chemical Equations

Conventions for Writing Chemical Equations MCAT General Chemistry by Leah Fisch

When it comes to chemical reactions it’s very easy to confuse all of the numbers and letters: Which go up or down? Which go in the parenthesis or out? This video breaks it all down from arrows and phases to coefficients, numbers for ions and polyatomic ions.

MCAT Reactions and Stoichiometry practice quiz coming very soon!

Want more MCAT Tutorials? See the MCAT Homepage