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30 đề thi học sinh giỏi môn hóa học lớp 10 & 11 của các trường chuyên khu vực duyên hải đồng bằng bắc bộ có đáp án

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. (0.5 điểm)<br />

Ion phức (A) <strong>có</strong> 2 <strong>đồng</strong> phân:<br />

H 3 N<br />

H 3 N<br />

Cl<br />

Co<br />

Cl<br />

NH 3<br />

NH 3<br />

H 3 N<br />

H 3 N<br />

Cl<br />

Co<br />

NH 3<br />

Cl<br />

NH 3<br />

Ion phức (B) không <strong>có</strong> <strong>đồng</strong> phân:<br />

NC<br />

NC<br />

CN<br />

Co<br />

CN<br />

CN<br />

CN<br />

Ion phức (C) <strong>có</strong> 2 <strong>đồng</strong> phân:<br />

NC<br />

Cl<br />

Cl<br />

Co<br />

CN<br />

CN<br />

Cl<br />

NC<br />

Cl<br />

CN<br />

Co<br />

CN<br />

Cl<br />

Cl<br />

c. (0.25 điểm)<br />

CoCl 2 (NH 3 ) 4 + + Fe 2+ + 4 H + Co 2+ + Fe 3+ + 2 Cl - + 4 NH 4<br />

+<br />

-----HẾT-----<br />

15

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