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?
- 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