Jim Clark Chemguide May 2026

“If you add a small piece of sodium to a trough of water…” he would write, “here is what you will see. And here is why. Don’t skip this bit, or the next bit won’t make sense.”

In the mid-1990s, the internet was a new, wild frontier. Most people saw it as a place for clunky forums and basic HTML. Jim saw a blackboard without walls. He had no grand plan for fame or fortune. He simply began typing plain, unstyled text into a simple editor and uploading it to a small corner of the web. He called it “Chemguide.” jim clark chemguide

Today, Chemguide still sits there—a quiet corner of the internet, all text and no ads. A digital lighthouse. And somewhere, at 3 AM, a student will click on it, read a simple sentence, and for the first time, understand what a buffer solution really does. “If you add a small piece of sodium

Word spread, not through marketing, but through desperation and relief. A student in Singapore, lost in the night before an exam, would stumble upon Chemguide. A teacher in rural Africa, whose school had no textbooks, would print out Jim’s pages and pass them around. A university freshman in the US, failing general chemistry, would suddenly whisper, “Oh, that’s how orbital hybridization works.” Most people saw it as a place for

There was no flashy design, no pop-ups, no videos with loud music. Just a cream background, black text, and a hyperlink structure that was ruthlessly logical. Jim’s voice was unmistakable: patient, precise, and utterly unpretentious. He wrote like a kind, meticulous uncle explaining why sodium fizzes in water.