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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.

Test your Mastery with my NEW Stoichiometry & Reactions Practice Quiz!

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 Numbers in MCAT General Chemistry

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: Oxidation and Reduction Reactions

Oxidation and Reduction Reactions in MCAT General Chemistry by Leah4sci

Oxidation and Reduction Reactions: Learn what they are, how to identify oxidation and reduction half reactions, and how to recognize what gets oxidized or reduced in complex reactions including a time-saving shortcut.

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.

Video 11: Common Types of Chemical Reactions

Common Types of Chemical Reactions in MCAT General Chemistry by Leah4sci

Common types of chemical reactions that will show up on the MCAT include: Disproportionation, Single Replacement, Double Replacement, Combination or Synthesis, Decomposition, and Combustion

Video 12: Balancing Chemical Equations

Balancing Chemical Equations Stoichiometry Series by Leah FischStoichiometry or balancing of chemical equations can be tedious and confusing unless you have an efficient system to follow. These (3) videos will teach you a simple approach and a few time-saving shortcuts for balancing reactions from simple to more complex such as acid/base, ionic, and combustion reactions

Video 13: Balancing Redox Reactions

Balancing Redox Equations Stoichiometry Series by Leah Fisch

Balancing Redox Reactions requires balancing of atoms AND electrons. This video will teach you how to balance atoms and charge/electrons in oxidation and reduction reactions, then how balance redox reactions in both acidic and basic conditions.

Balancing Oxidation Reduction Equations Checklist Leah4sci

Stoichiometry and Reactions Practice Problems Leah4sciHow do you feel? Test your understanding with the new MCAT Reactions and Stoichiometry practice quiz!

Want more MCAT Tutorials? See the MCAT Homepage

3 Month MCAT Plan

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MCAT Tutorials, Videos & More

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Organic Chemistry Tutorials & Videos

Orgo Syllabus Companion
- Gen Chem Foundation for Orgo
- Orgo Basics Foundation
- Resonance Structures
- Naming Organic Compounds
- Acids and Bases
- Newman Projections
- Chair Conformations
- Chirality and Stereochemistry
- Fischer Projections
- Intro to Mechanisms
- Alkene Reactions
- Alkyne Reactions
- Free Radical Reactions
- Substitution Elimination Reactions
- Diels Alder
- Aromaticity & Electrophilic Aromatic Substitution (EAS)
- Alcohols
- Oxidation and Reduction
- Acetal / Ketal
- Enolate Reactions
- Proton NMR Spectroscopy

Organic Chemistry Study Guide Cheat Sheets

2023 MCAT Test Dates

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Radicals: Reactions, Stability Hybridization+

Click for New Tutorial: All about Free Radicals

Free Radicals in Organic Chemistry - Hybridization, Stability, Resonance, Reactions and Mechanism Videos

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Organic Chemistry Reference Material and Cheat Sheets

Alkene Reactions Overview Cheat Sheet – Organic Chemistry

The true key to successful mastery of alkene reactions lies in practice practice practice. However, … [Read More...]

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MCAT Tutorials

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Introduction To MCAT Math Without A Calculator

While the pre-2015 MCAT only tests you on science and verbal, you are still required to perform … [Read More...]

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Organic Chemistry Tutorial Videos

KET Keto enol tautomerization reaction and mechanism leah4sci

Keto Enol Tautomerization Reaction and Mechanism

Keto Enol Tautomerization or KET, is an organic chemistry reaction in which ketone and enol … [Read More...]

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