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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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VD7: 4 + HCl KCl + MnCl 2 + Cl 2 + H 2 O<br />

Chú ý<br />

7 2<br />

Mn 5e Mn<br />

1 0<br />

2Cl - 2e Cl2<br />

x 2<br />

x 5<br />

Cl 2<br />

trong MnCl 2, KCl).<br />

1<br />

Cl<br />

7 2<br />

2Mn 10e 2Mn<br />

1 0<br />

10 Cl - 10e 5Cl2<br />

– B4: 2KMnO 4 + HCl KCl + 2MnCl 2 + 5Cl 2 + H 2 O<br />

1<br />

Cl<br />

2KMnO 4 + HCl<br />

2KMnO 4 + 16HCl<br />

2KMnO 4 + 16HCl<br />

2KCl + 2MnCl 2 + 5Cl 2 + H 2 O<br />

2KCl + 2MnCl 2 + 5Cl 2 + H 2 O<br />

2KCl + 2MnCl 2 + 5Cl 2 + 8H 2 O<br />

VD8: 3 Al(NO 3 ) 3 + N 2 + H 2 O<br />

– B1, B2, B3:<br />

0 3<br />

Al 3e Al<br />

x 10<br />

5 0<br />

2N - 10e N2<br />

x 3<br />

0 3<br />

10Al 30e 10Al<br />

5 0<br />

6 N - 30e 3N2<br />

10Al + 36HNO 3<br />

10Al(NO 3 ) 3 + 3N 2 + 18H 2 O<br />

KL + HNO 3 (H 2 SO 4 )<br />

2O<br />

HNO 3 (H 2 SO 4<br />

KL HNO 3 (H 2 SO 4 ) H 2 O<br />

5<br />

58

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