# How is the avagadros constant derived? [closed]

İ heard that : Charge of a mole of electrons/charge of single electron =avagadros constant How is this derived ?

• What is a mole, come to think of it? Jan 21 '18 at 20:34
• Charge of a mole of electrons is the Faraday electrolysis constant. So the Avogadro constant can be measured in an electrolysis experiment. Jan 22 '18 at 0:01

For a mole of electrons you can start uf you firzt get the molar mass of water, call this $18.016$ grams per mole. Now electrolyze water with an inert electrolyte such as sodium sulfate. Work out the charge transfer required to decompose one mole = $18.016$ grams. This is two moles of electrons based on the stoichiometry of the electrochemical reaction. Half of this divided by the single electron charge is Avogadro's number.