Sometimes we talk about hydrogen and hydrogen production as though everyone understands the process. If we take a step back and show someone the basics, they get a better understanding of what's going on. It doesn't do much good to debate the pros and cons of PEM fuel cells if hydrogen is some vague concept.
General Motors has some great teaching tools on their web site for students and for everyone who is interested. This section shows the basic electrolysis process of producing hydrogen and steps you through a simple demonstration experiment. It's not a bad place to start.
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This was to be a how to?