Oscillating reactions are neat; I should write up one of my favorites sometime… Here, electrons flow from iron metal to mercury (I) sulfate to chromium (VI) oxide. Listen to the video for a step-by step explanation…
That is very cool. I especially like how it depends upon the changing surface tension of mercury.
Ah, memories! We did this experiment in public high school in the UK, 1963 or there-abouts. All of us, ourselves, not just watching the teacher do it. We used a lot more mercury, and got a correspondingly slower beat. Our teacher believed in what he called “bucket chemistry” – or “we doan need no stinkin 5 ml test-tubes!”.
And then I have not heard of it again until this year, and suddenly many references.
This one’s probably my favorite, and the neatest demonstration of it that I’ve seen.
I have a book from 1932 “Experiments for Boys” where this is experiment is described as something boys could do at home. Quite a lot of good stuff with mercury in that book. It was better in the old days, before everything turned so dangerous.
New comments have been temporarily disabled. Please check back soon.
It looks like you haven’t added any widgets to this sidebar yet. To customize this sidebar, go add some!