Untuk menghasilkan 9 gram aluminium dari elektrolisis leburan Al2O3 (Ar Al = 27; O = 16), diperlukan muatan listrik sebesar?
(A) 19.300 coulomb.
(B) 38.600 coulomb.
(C) 57.900 coulomb.
(D) 77.200 coulomb.
(E) 96.500 coulomb.
(A) 19.300 coulomb.
(B) 38.600 coulomb.
(C) 57.900 coulomb.
(D) 77.200 coulomb.
(E) 96.500 coulomb.
Verified answer
Elektrolisis- Hukum Faraday
Al₂O₃ => 2Al³⁺ + 3O²⁻
e = Ar / n
e = 27 / 3
e = 9
w = eF
F = w / e
F = 9 / 9
F = 1 Faraday
F = q / 96500
q = F × 96500
q = 1 × 96500
q = 96500 Coulomb