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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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– Chú ý:<br />

2Al + 2NaOH + 6H 2 O 2Na[Al(OH) 4 ] + 3H 2<br />

n<br />

H2<br />

3<br />

n<br />

2<br />

Al<br />

– 2;<br />

– 3 loãng, sinh ra y mol<br />

khí N 2<br />

(A) x = 2y. (B) y = 2x.<br />

(C) x = 4y. (D) x = y.<br />

TN1: 2Al + 2NaOH + 6H 2 O 2Na[Al(OH) 4 ] + 3H 2 (1)<br />

TN2: 8Al + 30HNO 3 8Al(NO 3 ) 3 + 3N 2 O + 15H 2 O (2)<br />

3a<br />

x 2 4<br />

y 3a<br />

8<br />

x n 3 3<br />

H<br />

n 2 Al<br />

2 2<br />

a (mol).<br />

y n 3 3<br />

N2O<br />

n Al<br />

8 8<br />

a (mol).<br />

hay x = 4y<br />

1<br />

318

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