This brief video tutorial briefly discusses osmosis, osmotic pressure, oncotic pressure and tonicity: 0:00​​. Introduction 0:13. Osmosis 1:31. Osmotic pressure 2:03. Oncotic pressure 3:34. Tonicity - 3:47. Isotonic solution - 4:15....

00:00 Introduction 01:51 Early History of Delphi 05:54 The Oracle Explained 09:03 Geochemical Gas Theory 12:03 Problems with Gas Theory 16:20 Alternative Theory: C02? 17:48 Synthesis: Trance, yes. Gas? No.

We've all heard the terms acid and base. What do these mean? Don't just tell me about pH, silly. What structural detail makes a molecule an acid or a base? You don't know? Well, you'd better watch this then. You don't want to be...

The pH scale is used to determine whether a substance is acidic or basic, and to calculate how strong a chemical it is. A pH value is a number that ranges from 1 to 14 for most common chemicals, with seven being the middle or neutral...

Relating Equilibrium Constants: Kp and Kc (Keq)

Management Concentration

This is a lecture presentation on diffusion, where the process of diffusion of particles in liquids or gases is explained in terms of kinetic particle theory. The presentation incorporates a mixture of two liquids and a demonstration...

Management Information Systems Concentration

This video covers concentrations in moles per decimeter cubed, explaining the concept of concentration, how to calculate concentration using mass and volume, and why moles are useful in chemistry. The video also covers how to convert...

We've learned about kinetics already, but how do we gather kinetic data? One clever method is by analyzing how the color of a solution changes over time, which is an indication of the concentration of certain compounds that interact with...

Concentrations on chemical species from mole balances are solved for 1, 2, and 4 species in Python with the Scipy.Integrate package ODEINT.

From foothill elevations to high mountain peaks, hundreds of flower species are found throughout Yosemite National Park. Rangers and scientists discuss the rich botanical history and some of the rare plants found here.

From foothill elevations to high mountain peaks, hundreds of flower species are found throughout Yosemite National Park. Rangers and scientists describe the rich botanical history and some of the rare plants found here.

This video discusses the required practical activity from the biology specification which involves investigating the effects of different concentrations of sugar solutions on the mass of plant material. The video uses the definition of...

Hear Encyclopaedia Britannica editor Michael Ray explain the Allied invasion of Omaha Beach during the Normandy Invasion of World War II using infographics.

We know a bit about acids and bases, including the definitions of pH and pKa, as they relate to an acid-base equilibrium. If we have a weak acid and its concentration, as well as the pH of the solution, can we calculate the Ka for the...

Astronomers seem to have revealed a puzzling detail in the way dark matter behaves.

They found small, dense concentrations of dark matter that bend and magnify light much more strongly than...

We know that a lot of thermodynamic data is collected under standard conditions, but sometimes we will want to assess the free energy change associated with a process that is not occurring under standard conditions. Any other conditions...

Sometimes when we do equilibrium calculations, we have to use an ICE box. Don't worry it won't be chilly, it stands for initial, change, and equilibrium. Let's use this technique to calculate some equilibrium concentrations!

We know how to write equilibrium constant expressions for any equilibrium, and we know that they relate the equilibrium constant to the equilibrium concentrations for all of the substances in the system. Let's see if we can calculate a...

To figure out the rate law for a reaction, we have to gather kinetic data. We can't know just by looking at the balanced equation. Let's practice using initial rates data to determine the rate law for a reaction!

David Hasslehoff did chemistry?! No wait, Hasselbalch. And Henderson. Anyway there's this equation, and it relates the pH of a buffer solution to the pKa of the acid and the ratio of the concentrations of the acid and conjugate base....

Proof that pH=pKa when conjugate acid and base concentrations are equal; proof that conjugate acid and base concentrations are equal when pH=pKa

Calculation of pH with known species concentration and pKa