Changes

Covering how energy in electrons is related to its position and calculated by quantum energy changes. Also covered is quantum numbers, how they are assigned, and what they mean.

This short flash animation attempts to show you the physical processes that are at play during vacuum filtration. It shows how the vacuum (reduced pressure) is created in the Buchner flask using a simple siphon pump. It goes on to show how this causes a suction that draws the filtrate speedily through the filter paper and porous plate. It ends by drawing attention to the additional benefit of air drying the residue.

This video compares deprotonation and ligand substitution. On the way, it considers how hydrolysis in aqueous solution leads to a drop in pH. It concludes by looking at the spectrochemical series, stability constants and entropy changes.

This lesson will look at Energy in Reactions and will give an explanation of with a step by step look to better explain the concept.

This video reviews enthalpy and entropy and describes the idea of spontaneity within reactions and changing states of matter