What we've got inside that huge beaker is water on.

We've put in an indicator called Fianna Fail in neutral.

That's Collis.

But once we put this other chemical win their sodium hydride, the sodium hydride will react with water, and it should be a very vigorous reaction.

It produces sodium hydroxide, which is a base on that will therefore turn the solution.

Pink sodium hydride is really quite an interesting compound.

I often say that, but I think sodium hydride is particularly interesting because it contains the hydride iron, which is a TSH minus.

Let me explain here I have a rather crude model.

This is a sodium atom, and this is a hydrogen atom.

And in the sodium atom, there is one electron, which is in the outer shell and in sodium hydride in the solid.

One of these electrons is transferred from the sodium to the hydrogen, so you have sodium, plus where the outer electron has been removed and over here you have eight minus.

That's hydrogen atom.

When extra electron, these irons are in the solid.

Andi, when you dissolve them in water.

What happens is they dissolved, so you get in a plus and H minus in solution.

But the hydrogen does not hold on to its electron very strongly, and the electron is easily removed by reaction with water.

As they drop the sodium hydride into the water, first bullet hits the surface, then it begins to dissolve, and as it begins to dissolve, it forms an A plus H minus and the H minus can then react with water.

Water, as you know, is H +20 If you take a check minus plus H +20 it goes toe H two hydrogen gas and oh H minus, which is the hydroxide Dan, which is what makes things alkaline so well, then have a witch minus in the solution.

The O.

H minus can then interact with the finger off Darlene, which goes from colorless to red or pink, depending on the concentration.

So, overall, what happens when you drop it in?

There is a great babbling as the hydrogen gas comes out and it goes red.

What?

Sometimes it depends on the particular reaction conditions.

The hydrogen can touch fire and you can get big flames.

It looks good, but good chemists shouldn't get big flames way.