Soal Kimia Kelas 12 ​

Jawaban:

C

Penjelasan:

t =2×60=120 detik

mol elektron = F = (i×t)/96500 = (2×120)/96500= 0,0025 mol

Cu^2+ + 2e –> Cu

0,0025 mol — 0,0012 mol

(Perb koef = perb mol)

Massa Cu = mol × Ar = 0,0012 × 64 = 0,07958 gram = 79,58 mg

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