How many hydrogen atoms are generated from 1 liter of water by electrolysis?

Answer 1

The minimum voltage necessary to generate hydrogen and oxygen from water by electrolysis is 1.23 V. It depends on how you do it if it will take that much or more (if you don't use the correct electrode, it will take much more, but never ever less).

How much power it takes depends on how much water you want to split!

Answer 2

Making water by electrolysis occurs in the following balanced reaction:

2H2O ---> 2H2 + O2

Therefore there is a 1-to-1 ratio (really 2-to-2, but that's the same) of moles of water to moles of hydrogen gas in the balanced reaction. Therefore the number of moles of hydrogen made is equal to the number of moles of water electrolyzed.

We must do the calculation using moles, not grams or kilograms. The molecular weight of H2 is 2.016 grams per mole. To find the number of moles of H2 in 1 kilogram:

1000 grams ÷ 2.016 grams/mole = 496.081 moles of H2

Because of the 1-to-1 stoichiometry of the balanced reaction, it requires 496.081 moles of water. The molecular weight of water is 18.015 grams/mole. Therefore 496.081 moles of water will weigh:

18.015 grams/mole x 496.081 moles = 8936.80 grams = 8.9368 kilograms

That is also equal to 8.9368 liters of water (exactly if at 4 °C).

See the Related Questions to the left for more information about how to solve this type of stoichiometry problem.

Answer 3

For answers to any of your hydrogen-related questions, just ask the MIT PhD who currently runs a company that manufactures hydrogen production technology. His company is called Avalence (www.avalence.com) and his name is Marty Shimko. His contact information is on the website under contact. Enjoy! For answers to any of your hydrogen-related questions, just ask the MIT PhD who currently runs a company that manufactures hydrogen production technology. His company is called Avalence (www.avalence.com) and his name is Marty Shimko. His contact information is on the website under contact. Enjoy!

Answer 4

1 liter of water is 1000 grams of water. And 1000 grams water DIVIDED BY 18.015 grams per mole EQUALS 55.5093 moles. And 55.5093 moles TIMES 6.0221 x 10^23 atoms per mole = 3.3428 x 10^25 molecules of water. Now, there are 2 hydrogen atoms in each molecule of hydrogen gas (they form pairs), and there are also 2 hydrogen atoms in each water molecule. So electrolyzing 1 liter of water will produce 3.3428 x 10^25 hydrogen gas molecules (the number of actual hydrogen atoms is twice that, or 6.6856 x 10^25 hydrogen atoms). The 10^25 means 10 raised to the power of 25. You could also write this number as 3.3428E25 molecules. To put that into perspective, that is 33.43 trillion trillion hydrogen gas molecules.

Answer 5

Firstly you need to know what you are electrolysing. then you need to know the overpotential, and pH (if water) and quite a few other things (i.e. electrode active area/type of material). There are many variables

Answer 6

yes that's one of the sustances.

when you electoryse salt water, you basically send a current through it and this produces 3 products: hydrogen, chlorine, sodium hydroxide.

Answer 7

At 100% efficiency it would require 39 Kwh of electricity to produce 1 Kg of Hydrogen. Efficiencies of around 90% are possible under some conditions.

Answer 8

Out of every 3 liters of water 2 should be hydrogen. Do the math.