Home > Community > How much hydrogen you can produce from electrolysis of 1 liter water? Need the exact amount and official source of the data.
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KingKongDingDongDingDongDingDong

How much hydrogen you can produce from electrolysis of 1 liter water? Need the exact amount and official source of the data.

Annmarie Wilson  Follow

1 liter of water = 1 kg of water.

Molar mass of water = 18g, of which H2 = 2g, O = 16g. So 2/18 = 1/9 = 11%.

So one liter of water gives 110g of hydrogen gas, which is about 1.3 cubic meters of gas at normal temperature and pressure.

Sorry, I haven’t got an official source for this data. All I did was calculate it from basic principles. I’m not sure what source you’d find this at, or why you’d need a source for basic maths - or the molecular weight of water. I can add 2 + 16 to make 18.

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Bella Jackie  Follow

Hydrogen and oxygen can be split or produced from water by hydrolysis. The balanced equation for this reaction is :

2 H2O → 2H2 + O2

You can conclude that 1 mol H2O produces 1 mol H2

Now you take 1.0 L water. Density of water at 25°C = 997 g/L

Mol water in 997 g:

Molar mass water = 2*1.008 + 15.999 = 18.015 g/mol

Mol H2O in 997 g = 997 g / 18.015 g/mol = 55.34 mol H2O

This will produce 55.34 mol H2

Molar mass H2 = 1.008*2 = 2.016 g

Mass of H2 produced = 55.34 mol *2.016 g/mol = 111.57g OR 0.11157 kg

You ask “How much hydrogen …. “

I think that quoting this in mass units , grams or kg is correct.

This is the best I can do for the exact amount .

Official source ? I have used accepted chemistry methods to calculate this. Is this an official source ? I do not know .

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