Điện phân dung dịch CuSO4, cực dương bằng đồng. Biết hiệu điện thế hai cực bình là 12 V và điện năng tiêu thụ của bình là 0,5 kWh. Cho A = 64, n = 2. Tính khối lượng đồng bám vào catốt.

2 câu trả lời

Đây bạn nhé.

Đáp án:

`m_{Cu}=0,0138(g)`

Giải thích các bước giải:

Tóm tắt:

$W=0,5(kWh)=500(Wh)$

$A=64(g/mol)$

$n=2$

$U=12(V)$

_______________________________

$m_{Cu}=?(g)$

Giải:

Ta có:

`W=U.I.t`

`=>I.t=\frac{W}{U}=\frac{500}{12}`

Khối lượng đồng bám vào catốt là:

`m_{Cu}=\frac{1}{F}.\frac{A}{n}.I.t`

`=\frac{1}{96500}.\frac{64}{2}.\frac{500}{12}=0,0138(g)`

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