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K (-) : 2L²⁺ + 4e⁻ ⇒ 2L
A (+) : 2H₂O ⇒ O₂ + 4H⁺ + 4e⁻
2L²⁺ + 2H₂O ⇒ 2L + O₂ + 4H⁺
mol gas O₂
mol = V/22,4 = 0,448/22,4 = 0,02 mol
perbandingan mol = perbandingan koefisien
maka mol logam L = 2 x 0,02 = 0,04 mol
Mr L = gr/mol = 2,56/0,04 = 64 g/mol