Empirical Formula and Molecular Formula Calculations

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

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 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

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

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 […]

Ionization of Water in MCAT Acid Base Chemistry

Water is a fascinating molecule to study, especially in reference to acid base chemistry.   Both amphoteric and amphiprotic (explained in video) it will undergo ionization to yield both an acid and a base. This video breaks it down and covers important related calculations required for the MCAT. (click to watch on YouTube.  Read Video transcript […]

Weak Bases pH pOH ka and kb Calculations in MCAT Chemistry

When it comes to acid base calculations on the MCAT, weak bases are potentially the most confusing. Not only do you have to convert from pOH to pH, but you may also find yourself having to find the kb from a given ka to start the process. And worst of all, you learned all this […]

pH and pOH for Strong Bases in MCAT Chemistry

Acid base calculations get trickier when dealing with bases since most MCAT style questions will ask about pH instead of pOH. This means you have to be comfortable calculating both OH- and H+ concentrations to find pOH and pH values. This video breaks it down with a few examples. (click to watch on YouTube. Video […]

pH Calculations for Strong Acids in MCAT Acid Base Chemistry

pH Calculations are important for the MCAT, which means you must understand how to find both pH and H+ concentrations when given strong acidic solutions. This video walks you through the strong acids to memorize, as well as my quick-math method for finding pH from a given strong acid concentration. (click to watch on YouTube.  […]

Ka and pH shortcut for Weak Acids in MCAT Chemistry

Ka and pH calculations for weak acids can be trick on the MCAT if you attempt a general chemistry approach. Ice tables and quadratic equations are not only a waste of time, but nearly impossible without a calculator. This video shows you my shortcut for skipping the ICE chart and skipping the quadratic equation for […]