CHEMISTRY: So tell me again – how do you know if a chemical reaction has occurred? Here’s the lecture on the evidences of a chemical change and the intro to balancing chemical equations. Great to be back to chemistry!

I love what you did with the paper chromatography lab yesterday and today. Lab reports, including your pictures of your will be due Saturday midnight. Note the change – you won’t be drawing the results, instead you’ll take pictures of BOTH sets of chromatographs and BOTH sets of unknowns. Tomorrow, when you first get to class, take photos of your chromatographs with a ruler laying beside them so you can also your results at home for your observation. Be sure your initials are on everything!!

BTW – Here are links to the videos from today if you want to learn more!

Fluorine Reactions
Blue Flame Thrower – Diethylzinc

Chemistry 4-26-16 Describing Chemical Reactions from Tammy Skinner on Vimeo.

Image source: periodicvideos.com