Redox Pairs and Common Oxidizing and Reducing Agents

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

Oxidation and reduction cannot happen on their own. When one atom loses electrons another atom has to gain these electrons. This video walks you through redox pairs using the mnemonic LEO the lion says GER to help you understand oxidizing/reducing agents. You’ll also learn how to recognize (rather than memorize) common oxidizing and reducing agents. […]

Calculating Oxidation Numbers in MCAT General Chemistry

Calculating Oxidation Number in MCAT General Chemistry by Leah Fisch

Oxidation numbers can be confusing, unless you think of it as charge (real or imaginary) associated with each specific atom in a complex molecule or polyatomic ion. This video shows you how to find and calculate oxidation numbers when given simple and complex molecules or ions. (Watch on YouTube: Oxidation Numbers. Click CC for transcription.) Links […]

Mole and Avogadro’s Number in MCAT General Chemistry

Stoichiometry & Reactions 6 play

Moles and Avogadro’s number are big! And they come across as overwhelming. But YOU can master them! This video covers the definition of Moles, with an illustration showing the logic of moles in general chemistry. You’ll also see how to easily and quickly convert from and to them on the MCAT. You’ll see conversions including […]

Percent By Mass Composition MCAT General Chemistry

Stoichiometry & Reactions 5 play

All the composition by percent mass questions don’t have to be confusing. You can use them to get the information you need! Learn ONE rule for them all! This video makes this concept simple. You’ll see WHY and HOW these equations work, instead of memorizing all the different percent formulas. You will see examples worked step-by-step my […]

Molarity Molality and Molar Mass for MCAT General Chemistry

Stoichiometry & Reactions 4 play

Molarity, Molality, and Molar Mass calculations can get overwhelming FAST on the MCAT. This video shows you how to easily calculate each of these concepts as well as some time saving shortcuts with a few examples. You’ll learn the differences between molarity vs molality as well as fun trick for quickly estimating between them on the MCAT! (Watch […]

Empirical Formula and Molecular Formula Calculations

Stoichiometry & Reactions 3 play

Navigating through empirical formulas versus molecular formulas will help you in conversions, unknowns, and so many exam problems. This video explains the definitions, similarities, and differences between an atom’s empirical formula and its molecular formula. You will also see when the empirical and molecular formulas are the same, and a percent by mass example! (Watch […]

Molecular Weight and Formula Weight Calculations

Stoichiometry & Reactions 2 play

Molecular weight and formula weight calculations are key to understanding the specifics behind any MCAT reaction and experiment. This includes both atomic mass unit and grams per mole calculations. And maybe even the conversion from AMU to g/mol. This video shows you how to find molecular weight in AMUs, grams per mole, and formula weight […]

Introduction to Reactions and Stoichiometry in MCAT General Chemistry

Stoichiometry & Reactions 1 play

Stoichiometry is part of MCAT Chemistry Content Category 4E. This video introduces the terms you will need for mastering this content category. Learn the distinctions between atoms, compounds, covalent bonds vs ionic bonds, molecular formula vs empirical, theoretical yield vs actual yield, and much more. (Watch on YouTube: Intro to Stoichiometry. Click cc for transcription.) Links […]

pH and Hydrolysis for Salts of Weak Acids and Bases in MCAT Chemistry

pH and Hydrolysis of Salts of Weak Acids and Bases in MCAT Chemistry by Leah Fisch

Video 8 is the final, and potentially most intriguing video in my MCAT Acid Base series. This video shows you how to identify salts that will result in an acidic, basic, or neutral solution. You’ll learn how to think about each ion to help you determine its effect on pH. (Click to watch on YouTube. […]

pH pOH Wheel Acid Base Calculations in MCAT Acid Base Chemistry

pH pOH Wheel Acid Base Calculations in MCAT Chemistry tutorial video

When you learn conversions between pH, pOH, H+ and OH- concentrations, it’s easy to get overwhelmed by all the different pathways and inter-conversions. This video shows you my pH/pOH wheel allowing you to easily identify where you are, what you need to calculate, and the most efficient path to get there. (click to watch on […]