Professor Dave Explains
Practice Problem: Titration Calculations
Titration is a way to do stoichiometry with acids and bases. The equivalence point tells us something about the moles of acid and base that are present in solution at that moment. And if we know one of those values, we can know the...
Professor Dave Explains
Practice Problem: Molarity Calculations
Solution concentration is measured in molarity, which is moles solute per liter of solution. Can we calculate concentration, moles, or volume, given the other two values? Sure, it's easy!
Professor Dave Explains
Practice Problem: Enthalpy of Vaporization
Can we do stoichiometry regarding phase changes? Sure! If we know how many moles of a substance we have, and the energy associated with each mole of that substance undergoing a particular phase change, we can get the energy associated...
FuseSchool
How To Use Moles - Part 3
Watch the final part of the 'using moles' videos, to complete your understanding of the chemical calculations topic. Avogadro’s number describes what is known as 1 mole, or 12 g of carbon atoms. This is used in chemical calculations. For...
Catalyst University
General Chemistry | Ideal Gas Law (PV=nRT) [Example #1]
In this video, we will do an example calculation using the ideal gas equation of state, PV=nRT. [Solving for volume, V]
Curated Video
Calculating Yield and Percentage Yield in Chemical Reactions
The video discusses two important quantities in chemistry, yield and percentage yield, which are used to determine the effectiveness of a chemical reaction. The video also mentions the concept of atom economy, which measures the amount...
Curated Video
Calculating Balancing Numbers in Chemical Reactions and Limiting Reactants
The video explains how to use the masses of reactants and products in a chemical reaction to calculate the balancing numbers in a symbol equation. Two examples are provided to illustrate the process, and the concept of limiting reactants...
Catalyst University
Calculate Concentrations in a Buffer (Example Problem)
In this video, we discuss Calculate Concentrations in a Buffer (Example Problem)
Catalyst University
Physical Chemistry: Entropy, Enthalpy Calculation
Physical Chemistry: Entropy, Enthalpy Calculation
Professor Dave Explains
Molar Gas Volume: Stoichiometry With Gases
We know a lot about ideal gases, including how to use all of the ideal gas laws. But we haven't talked much about how to do stoichiometry with gases. As it happens, we can do stoichiometry with gases not just using molar quantities, but...
FuseSchool
How To Use Moles - Part 1
Learn the basics about using moles. This is part 1 of 3 parts, teaching you about using moles, as a part of the chemical calculations topic. Avogadro’s number describes what is known as 1 mole, or 12 g of carbon atoms. This is used in...
FuseSchool
How To Calculate Gas Volumes
Do you want to know how to calculate the volume of gases? This chemistry video will show you how to do it with simple real world examples. If you know two of these three, you can work out the third: mass in grams, number of moles and...
Professor Dave Explains
Non-Ideal Gases and the Van der Waals Equation
We learned about ideal gases, as well as kinetic molecular theory, which explains the laws that govern ideal gases. But some of the postulates of this theory won't always hold true. When a gas is highly pressurized and/or very cold, it...
FuseSchool
Concentration Formula & Calculations
Learn the basics about Concentration formula and calculations. How do you calculate the masses of reactants and products from balanced equations? Find out more in this video!
Professor Dave Explains
Calculating Ion Concentrations in Solution
We know that concentration is typically expressed with molarity, which is moles per liter. But how do we know how many moles of solute are present in solution when an ionic solid dissolves in water? It's not so simple because these will...
FuseSchool
How To Do Titration Calculations
Titration experiments enable you to work out the concentration of an unknown solute, when you know the concentration of another solute. After carrying out the experiment, you have to do some calculations. In this video we run through...
Catalyst University
Real Gas Behavior | Fugacity & Equilibrium
Fugacity can be related to the equilibrium constant just like pressure. In this video, we derive an expression for the Kf (fugacity equilibrium constant) using Kp and the fugacity coefficients.
Catalyst University
Real Gas Behavior | The Compression Factor (Z) [Example #2]
Here, I work a second example in which we calculate a real gas's compression factor.
Catalyst University
Physical Chemistry | The Compression Factor (Z) [w/1 example]
1) What is the compression factor? 2) How is it calculated? 3) What does it tell us about repulsion, attraction, and energy? 4) 1 example of calculating compression factor. ***Another Example: https://youtu.be/Z5NsvRPZT6I
Professor Dave Explains
Expressing Concentration by Mass Percent
We know how to express solution concentration in terms of molarity and molality, but the common public also needs to communicate concentration for certain reasons, and they don't really know about moles and things like that. What do they...
Professor Dave Explains
Kinetic Molecular Theory and the Ideal Gas Laws
I bet many of you think that the ideal gas law must prohibit passing gas on the elevator. That's a very good guideline, but there are other important laws we must know! Let Professor Dave run you through the details.
FuseSchool
What Are Dilutions
In this video, we will look at what dilutions are in chemistry, how to calculate them using a very easy equation and even extending to multiple dilutions which are called serial dilutions. Dilution is the process of adding water (or...
Professor Dave Explains
Kinetic Molecular Theory and its Postulates
We learned about ideal gases and the ideal gas laws, and we briefly touched on kinetic molecular theory, which puts these laws in context. But let's now go through this theory more rigorously, analyzing each postulate one at a time.