[Channel-talkchemistry] Reactions in chemistry workshop #8

Using flame test to identify an unknown compound is a standard activity when discussing quantum mechanics. I think the twists that Mr. DeGennaro includes for the students to interpret a persons observations and conclusions of a chemical explosion at a factory was a good opportunity for apply concepts. The student discussion and presentation during this activity showed that they understood what was going on during the flame test activity and how it can be applied. I have used the electric pickle demonstration to talk about electron movement as related to quantum mechanics and also to discuss ionic bonds and mobile ions to move current. The other activity involved identifying an unknown in a solution using precipitation reactions involves applying concepts. I think it is important to step back and let the students "figure it out." I really have to catch myself from telling the students the answers when they are attempting to problem solve differently than what I see as the correct solution. In the analyzing unknown activity there was a lot of student discussion, with students helping work through misunderstandings.

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Received on Fri Nov 19 10:25:30 2004