Molecular Reasons

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Excerpt from Learning Chemistry: the Importance of Imagination, by Dr. Dave Woodcock of Okanagan University College

In terms of learning science, two options are available.

  • You may approach any topic by rote learning of definitions and problem solutions. The problems encountered here are due to difficulty in memorizing using the taxon system, and the amount of material to be memorized. Additionally, although a rote learned route to solve a problem will always solve that particular problem, variations are not solvable using taxon memory.

  • You may also approach any topic by visualizing and using your imagination, an approach involving the locale memory system. This way you can quickly and fairly effortlessly build up understanding of a scientific theory. The problems encountered here are due to the build-up process which must start somewhere and proceed steadily in the imagination. Difficulties are encountered here if precise (word-for- word) definitions are required, but since no single route through a problem is memorized, alternative routes and variations in problems are treated without difficulty.

The choice of approach is yours and should only depend on the nature of the learning that you wish to do. The reality is likely that you have emphasized the taxon system of memory in your academic learning and de-emphasized the locale system. In fact, though both systems are important, it is probably the locale system that is most important in science and problem solving. Now that you know of its existence, you can devise ways in which you can start to develop your locale system in the learning of science. To me this means learning to use your imagination.

For example, if my algebra class is just starting to work with word problems, I might include tips on how to approach the next problem set. Or if they're working on a writing project, I could include some hints on how to construct a paragraph, a topic sentence, or a short essay.

General Study Tips

Questions to ask Yourself

How do you solve a problem now ?

  • Most students will solve an academic problem, say in chemistry, by trying to remember another example of the same problem or by trying to find or remember a similar problem.

  • This method is very limited, since the only problems you can solve are those that you have already met, or that you have exemplified in your notes or text.

What type of problem are you expected to meet in a course such as this one ?

  • In chemistry classes and laboratory sessions you will meet various types of problem. Your text also illustrates many types of problem. However on a test or examination, you may meet a problem of a type you have never encountered.

  • Consequently it is imperative that you learn how you can deal with problems that you have never met.
More of these by clicking on the following website:

Problem-Solving Skills

Introduction

There are no magic recipes that work for solving all problems. The hints and strategies described below provide a starting point to improve your problem-solving skills. The best way to develop and refine your problem-solving skills is simply to practice solving a variety of problems.


General Strategies

1. Identify what the problem is asking. Also identify the units of the answer.

2. Identify what information is given. Not everything will be spelled-out in a problem. You might have to draw on your knowledge or reference sources, such as textbooks, for equations or conversion factors. There can also be extra information given that is not needed to solve the problem.

3. Look for paths to get from what is given to what is asked. If a problem-solving strategy is not obvious, and it usually isn't, start working forward from the given information, and work backwards from what the problem asks. If possible, break the problem down into smaller parts.

4. Evaluate the reasonableness of a result. If the result is not reasonable, e.g., wrong units or unreasonable order of magnitude, look for possible errors and reevaluate your approach.


Other Hints

Read the problem carefully. You might have to read the problem several times to understand what the problem is asking, and what information it provides. Dissect the problem as much as possible.

Use dimensional analysis. Check the units as you are working through a problem and be sure that the units of your result matches the units of the requested quantity.


Chemistry in Practice