Organic Practical Setup 5. Washing to remove acid impurities

This Chemistry lesson is titled A Colorful Magic Trick with Acids and Bases Low and will give a detailed explanation of the topic.

This video is for AP Chem in Mr. Newton's class. In this Part 2 lesson of acid / base equilibria we discuss the Bronsted-Lowry model, conjugate acid / base pairs, and amphoterism of water.

In this video I look at the use of the two main reducing agents employed in organic chemistry. These are lithium aluminium hydride (lithal) and sodium borohydride. I outline the mechanism (nucleophilic addition) in which hydride ions react with C=O groups to form alcohols via alkoxide intermediates. I compare the reactivities of the two reducing agents and discuss the explosive risks associated with using lithium aluminium hydride with protic solvents such as water or methanol. A practical setup, that could be used to reduce aldehydes and ketone with lithal, is presented at the end. It is one in a series of short videos looking at the main organic practical techniques: heat & distill; reflux distillation; washing and drying in solvent extraction; recrystallisation and melting point determination; and others

Part 1 of solution chemistry where I explain buffers and the interactions of different acid base situations

In this video lesson, Mr. Scullion demonstrates a reacting mass problem involving sulfur. Try the problem out on your own prior to finding out the solution.