Khan Academy: Suspensions, Colloids, and Solutions

In this solutions, suspensions and colloids worksheet, students use diagrams to show how particles are different in each of these mixtures. They also distinguish between characteristics of each of these types of mixtures and categorize...

A video lecture discussing the properties of homogeneous mixtures and how to distinguish between the different types. Understand that homogeneous mixtures that have large particles that eventually settle to the bottom are known as a...

Find out how tonicity is determined by ions that don't move across membranes and how it affects the movement of water. Rishi is a pediatric infectious disease physician and works at Khan Academy. [11:02]

Video lesson looks at hypotonic, isotonic and hypertonic solutions (tonicity) and seeing the effect of various types of solution on the direction of osmosis. [6:29]

See some common strong acids and strong bases. Also examine some examples of calculating the pH of a nitric acid solution, sodium hydroxide solution, and a calcium hydroxide solution. [12:32]

Learn about the autoionization of water, the autoionization constant Kw, and the relationship between [H+] and [OH-] in aqueous solutions.

Sal Khan introduces the circulatory system function and the structure and function of the heart. [14:53]

This video illustrates and explains how seismic waves function. These waves are broken down into two types: surface and body. Take a look into why waves help understand the structure of Earth. [8:38]

Recognize the relationship between Gibbs free energy, reaction quotient Q, and cell voltage. [12:31]

Can ancient scriptural accounts of the world's creation by God be reconciled with Darwin's new story? This article looks at three responses to this question: Conflict, Contrast, and Convergence.