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# a 100ml sample of 2 M NaCl was electrolysed for 25 min with a current of 1,45 A.what is the concentration of of hypochlorite produced?

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- billrussell42Lv 711 months ago
hypochlorite has a charge of –e, so it takes one electron per atom.

1.45 amps = 1.45 C/s

1.45 C/s x 25 min x 60s/min x 1 electron/1.602e-19 C = 1.358e22 electrons.

or 1.358e22 molecules of hypochlorite, which is ClO⁻ which is 35.5+16 = 51.5 g/mol

6.022e23 molecules/mole Avogadro constant

1.358e22 molecules / 6.022e23 molecules/mole = 0.0225 mol

0.0225 mol x 51.5 g/mol = 1.161 g

since you have 0.1 L, concentration is 11.61 g/L

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ok, learned something new.... thanks