Lab 7

Prompt: On your blog post, include a brief summary of the lab, the answers to the pre-lab questions from your manual, a photo of one of the flames you test, the identity of the two unknown flames, and how you know the identity.

Summary: The purpose of this lab was to identify chemicals based solely on the reaction that occurs when they are heated. We did this by testing various known chemicals and then trying to determine unknown chemicals based on our observation of known ones.

Pre-lab questions:
1. Excited electrons have absorbed energy and jumped to a higher energy level.
2. "Emit" means to give off or produce.
  3. In this experiment, atoms get their excess energy from the high temperatures.
4. Different atoms give off different colors of light due to their different chemical composition.
5.It is necessary to clean the wires before each test to make sure they are not contaminated with the previous chemical that was tested.

Unknown Chemical:
1.LiCl
2. KCl

We determined the unknown chemicals by comparing how they reacted with the heat to the chemicals we had already tested.The unknown chemicals behaved very similarly to ones that had already been tested so it wasn't too difficult telling which was which.