When it comes to balancing chemical equations, it’s very easy to get lost and confused by all the changing numbers. The videos below will show you a simple yet efficient approach to make sure you quickly account for all your numbers (minimal guessing) and don’t lose track of your work along the way. Balancing Equations […]

When it comes to writing chemical equations it’s easy to confuse all the little letters and numbers. What do they mean? Where do they go? This video breaks down every letter and number you’ll see in chemical reactions, from coefficients and phases to numbers that represent charges, multiple atoms or polyatomic ions. (Watch on YouTube: Chemical […]

While the MCAT will not test you directly on the different types of chemical reactions, you will be expected to know them as they show up in more complex questions, passages, and experiments. This video walks you through the common types of chemical reactions including Disproportionation, Single Replacement, Double Replacement, Combination or Synthesis, Decomposition, and […]

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.     Calculating Oxidation Numbers Video 1 – Oxidation Numbers This video shows you how to find and calculate oxidation numbers when given simple and complex molecules or […]

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 […]

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 […]

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 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 […]

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 […]