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COMPILATION Microscale chemistry lab techniques with chem

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					Microscale chemistry lab techniques with chemistry modeling curriculum

COMPILATION. Microscale chemistry lab techniques with chem modeling curriculum Date: Wed, 16 Jan 2008 From: Dennis Richards Subject: Microscale Chemistry Methods and Chem modeling Can any one tell me whether anyone in the modeling community is using Microscale Chemistry lab techniques with their chemistry modeling curriculum? Or are they incompatible with each other. By the way, I do not teach chemistry. I am trying to get my colleague to look into modeling and he is trying to adopt microscale chemistry to his lab. ****************************************************************************** Date: Thu, 17 Jan 2008 From: Carmela Minaya, Hanalani School, Hawaii Part of the beauty of the Modeling Instruction curricula is that it is very dynamic. The point of emphasis is the process of building a model the student can use for conceptual understanding to solve quantifiable problems. The teacher adds nuggets to help their students. Microscale labs are good because they can show the principles in an economical manner. However, they are not so good at showing mole ratios because nothing is quantified. I have used microscale labs when it was the concept that needed emphasis and not so much the ratios. For example, in net ionic equations, I asked students to write equations only if a precipitate formed. They can tell because of the color change or milkiness. Even that (identifying precipitate formation) was an art. Afterwards they tried to come up with some of the solubility rules and checked it with references. If it was the single displacement mole ratio lab with an iron compound and copper, then I wouldn't use microscale because it's the ratio I want them to see not just that something happened. I hope your colleague understands what I'm getting at. In modeling, the curriculum already has great labs, but the teacher is still free to incorporate or replace at their discretion based on their school budget and student needs - I believe that's called differentiation in education circles. In modeling, it's the process of building the model that's important. It would be a great advantage for your colleague to at least take Larry's chemistry modeling course next summer at ASU, then that can be a great place to start and develop his class curricula. Much of the curriculum is already well planned and thought out. It's the best modern curriculum I've seen for chemistry. Most of chemistry tends to be on either extreme: too easy only conceptual with hardly any quantification, or too detailed without the big picture only addressing quantifiable problems and not the behavior of the particles. Modeling in chemistry, in my humble estimation, does the best job of anything currently out there in teaching the models so that students will know how to solve the problems and understand what it is they physically are solving. ****************************************************************************** Date: Thu, 17 Jan 2008 From: Thomas Pfeiffer, Bellows Free Academy, Fairfax, Vemont I attended a couple of workshops on microscale chem about 7 or 8 years ago and I use microscale amounts whenever I can. It generates a lot less waste. If you're doing a quantitative lab with microscale, it helps to have a scale that goes to the thousandths of a gram. Qualitative stuff can be done in well plates or mini test tubes. ******************************************************************************

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Microscale chemistry lab techniques with chemistry modeling curriculum

Date: Thu, 17 Jan 2008 From: Laura Meyer, Pueblo Magnet High School, Tucson, Arizona I use microscale chemistry almost all the time just because chemicals are so expensive and because of the issue of waste disposal. It is simple to apply modeling techniques with these "labs". Modeling is a way of thinking. Just translate it with other materials. ******************************************************************************

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