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BÀI TẬP TRẮC NGHIỆM HÓA ĐẠI CƯƠNG VÀ VÔ CƠ CẨM NANG DÙNG LUYỆN THI THPTQG CHẤT LƯỢNG CAO (COLOR BOOK)

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12<br />

– 2.1e<br />

0 +2 0 +1<br />

2 + CuO Cu + H 2 O<br />

+2e<br />

H 2 H 2 2<br />

quá trình oxi hóa.<br />

oxi hóa.<br />

cho – O<br />

1<br />

2, NH 3 , N 2 O, NO, NO 2 , NH 4 NO 3 .<br />

2S, SO 2 , S, H 2 SO 4 , Na 2 SO 4 .<br />

4, KMnO 4 , K 2 Cr 2 O 7 .<br />

2 – , SO 4<br />

2–<br />

, NH 4+ , PO 4<br />

3–<br />

.<br />

Chú ý<br />

3O 2 ↽ ⇀ 2O 3<br />

2<br />

(1) 2SO 2 + O 2 SO 3<br />

(2) Fe 2 O 3 + CO 2FeO + CO 2<br />

(3) 2H 2 S + SO 2 3S + 2H 2 O<br />

(4) MnO 2 + 4HCl MnCl 2 + Cl 2 + H 2 O<br />

(5) 2H 2 O 2 2H 2 O + O 2<br />

(6) 2KClO 3 2KCl + 3O 2<br />

(7) P 2 O 5 + 3H 2 O 2H 3 PO 4<br />

(8) KOH + CO 2 KHCO 3<br />

(9) Fe + 4HNO 3 Fe(NO 3 ) 3 + NO + H 2 O<br />

(10) 2Al + Fe 2 O 3 Al 2 O 3 + Fe<br />

(A) 6. (B) 7. (C) 8. (D) 9.<br />

2<br />

55

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