Question

Larutan cuso4 dialirkan listrik sebesar 4 amper selama 30 detik. Berapa volume yang dihasilkan dianoda jika 1 liter gas no= 6 gram

Answer 1

Anoda (+) : 2H₂O ⇒ 4H⁺ + O₂ + 4e⁻

n e⁻ = i . t / 96500 = 4 . 30 / 96500 = 0.00124 mol

n O₂ = 1/4 x 0.00124 = 0.00031 mol

n NO = 6 gram / 30 g/mol = 0.2 mol

n O₂ / V O₂ = n NO / V NO
0.00031 / V O₂ = 0.2 / 1
V O₂ = 0.00155 L