Intelligent Design

[Mr.wizard]

In that case it's a meaningless bullshit inquiry, like this:
https://youtube.com/watch?v=JT0zjorR68A

Nonsensical. What possible reason do you have for assuming water, or anything for that matter, has a teleological purpose?

I'm going to be honest and say that I have no idea what a teleological purpose mean.
I don't agree that there is any purpose. But I do understand that there is no explanation for why 2 hydrogen atom and 1 oxygen atom forms water. 
Only the explanation for what happens during that process or in other words how it happens is available.

Anything involving chemistry is the explanation of what happens during that process. Not why that process happens and yield this particular result.

For example:

1+2 = 3.
How does it happen?
Because 2 is the equalent of 2 1's then we'd have a total of 3 1's because of the operation "+" in the R.H.S and 3 1's is called 3.
Why does it happen?
Because the number system was designed in such a way as to facilitate this result.

^ That why.

Numbers are labels we put on quantities, the number system doesn't design the quantities it only labels them in a way that we understand. 

Yes chemistry tells us what happens when things react to each other, I'm not sure why you think there has to be a purpose behind it.