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BÀI GIẢNG HÓA PHÂN TÍCH TS. GVC. HOÀNG THỊ HUỆ AN

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c) Điện cực oxy hóa – khử :<br />

Cấu tạo : gồm thanh kim loại trơ<br />

(Pt, Au, Pd,...) nhúng trong dd chứa<br />

một cặp oxy hóa – khử liên hợp<br />

Ký hiệu : Pt | Ox, Kh<br />

Quá trình điện cực : Ox + ne Kh<br />

Pt Nernst :<br />

E<br />

0<br />

Ox / Re d<br />

= EOx<br />

/ Re d<br />

+<br />

0,059<br />

n<br />

lg<br />

[ Ox]<br />

[Re d ]

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