So you're really interesting reaction the so called Belousov Jabotinsky reaction, which also lates the color changes on enough.

Sadly, she's lost her voice, so she's done the experiment.

But you're stuck with me to tell you what's happening.

Very fortunately, I have a particularly appropriate tie is actually a Russian tie, which is good because it's a Russian reaction.

And it has the two key elements of this reaction.

Manganese here on broom.

In there, this is a reaction, which has quite a complicated mixture of materials.

It begins quite easily with a beaker of water and concentrated sulfuric acid, and when you begin stirring it, you get really nice patterns, so called slayer and patterns.

When you mix two fluids of slightly different refractive index, it's just the fluids mixing together.

Then you start pouring in all sorts of ingredients.

There is moronic acid, which in organic acid Mangin ease sulphate and potassium bromate.

Roommate is assault of the lion br for bro mean 03 minus bro mean with oxygen's Randy.

Now what happens in this reaction is bromate reacts with the melon eight catalyzed by the manganese and generates roaming, roaming is orange, and so the solution goes orange.

But when the concentration of roaming gets quite high, suddenly reaction starts on.

The roaming reacts fairly quickly with the melon eight to make promo melon eight.

And so it all disappears in.

The solution gets covered this again.

Then slowly, more bro mean builds up in the solution, and it goes orange.

And then because the rate of reaction accelerates as you get more more, bro Ming suddenly foot, it reacts again, and the reaction so isolates between orange and colorless.

This reaction was first described, I think, in the late sixties or early seventies in a Russian publication, and sadly, nobody in the West believed it.

When they first heard about it, they thought it was quite impossible for a reaction to oscillating backwards and forwards.

But you can see for yourself it happens on Once people saw it, they got really excited because this looked a bit like a living thing.

So oscillating backwards and forwards and suddenly peoples started suggesting that oscillating reactions might be quite important as a basis of life on DDE.

Like many things in science, once they had worked through the equations for the rates of reactions they saw.

It was quite possible tohave color changes.

In fact, if you have a slightly more complicated chemical mix, you can change between two colors instead of being colorless.

And it's a really fascinating reaction because you feel it shouldn't happen.

But it's no country ring.

It really is there.

Of course, when you see something on video, you always think somebody maybe cheating.

But I was in the lamp and I saw it happening.

So it's okay.

The reaction stops eventually, partly because the bromate has all reacted, and also because the manganese catalyst starts reacting with the melon ate the organic compound, which sort of binds onto the manganese and stops it acting as a catalyst.

So by the end of the reaction, everything is spent.

If you have the right relative quantities, it will go for 20 cycles also, which is long enough to keep going to your board.