Why cant scientists create water in a lab?

The orbits of each atom's electrons must become linked, and to do that we must have a sudden burst of energy to get these shy things to hook up.

Hydrogen is extremely flammable and oxygen supports combustion, so a sudden burst of energy would create and explosion.

We can create water in a lab, but not massive amounts of water because it's too dangerous.

Forget science. concentrate on English, especially punctuation.

I'm pretty sure all of my chemistry professors demonstrated how hydrogen burns into water...

But if you're talking about trying to ease droughts, it's a lot easier to pump the water somewhere than collect hydrogen and ship it then burn it.

They can do that. Hydrogen plus oxygen and fire make water.

Ask lestermount

They just found a way to turn hydrogen into metal.

it happens all the time. It is an extremely simple process. Hydrogen plus oxygen plus flame is the simplest.

To make water, all that you require is a source of reduced hydrogen and a source of unreduced oxygen (or, actually the reverse, reduced oxygen with unreduced hydrogen will work but is much less common).

Such redox reactions are extraordinarily common in nature. You are doing it right now: breathing in oxygen (O2) and converting it to water (H2O) that you breath out.

Not a question of technological possibility, it is a question of cost and energy.

Ever heard of FIRE? That's how you make water, and CO2, and other oxides.

Any time you burn hydrogen or any hydrocarbon-based fuel, you "make" water - it's a normal part of the combustion products...

We did that during the first trimester of Senior High Chemistry Lab (roughly at 14 to 16 years old), just to practice lab techniques and, just as important, lab security (the process can be either very implosive or explosive if you don't do it right).

It takes 2 moles of hydrogen (44.8 litres at normal room pressure and temperature) and 22.4 litres of oxygen to make two moles of water (26 grams = 1 ounce approximately).

2H2 + O2 --> 2H2O

At normal room pressure and temperature, that water will likely be liquid very fast, occupying a volume of 26 millilitres.

Thus you have to account for a volume of 67,200 millilitres suddenly collapsing to a volume of 26 millilitres (a factor of around 2000x).

In practice, since not all molecules will combine, you don't get that much of a difference, but still enough to cause injuries if you are not careful.

As for your question: since we were in high school, being students, we were not "technically" scientists. Therefore no scientists created water in our lab.

In this era of "post-truth", you can use that as "evidence" that only high school students are able to make water in a lab.