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Giải nhanh hiện đại bài tập Hóa Học - Phương pháp 2 - Giải bài tập nhiệt nhôm (33 Pages)

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Al<br />

Cr O<br />

Y :<br />

Al : b<br />

Al O : a<br />

t 0 2 3<br />

Cr O : c<br />

2 3 2 3<br />

Cr : 2a<br />

Ph n 1:<br />

Al : b<br />

3<br />

Al : 2a b<br />

Al O : a Cr : 2a<br />

2<br />

2 3 H2SO 4:1,25mol btdt<br />

3<br />

2 3<br />

Cr O : c Cr : 2c<br />

Cr : 2a SO :1,25<br />

2<br />

4<br />

6a 3b 4a 6c 1, 25.2<br />

Ph n 2:<br />

Al : b<br />

Al O : a<br />

3<br />

Al : 2a b<br />

2 3 H2SO 4:3,2mol 3<br />

btdt<br />

Cr O : c<br />

2 3<br />

Cr : 2a<br />

NO : 0,5mol Cr : 2a 2c 6a 3b 6a 6c 2,7<br />

NO : 2,7<br />

3<br />

A.<br />

Câu 46:<br />

11,65gam<br />

Al : a<br />

Cr O : b<br />

2 3<br />

0<br />

t<br />

Al O<br />

Cr<br />

Al<br />

2 3<br />

Ph n 1:<br />

Al O Al O : 0,05<br />

2 3 2 3<br />

NaOH:0,15<br />

a 0,15<br />

2<br />

1,65g Cr NaAlO : 0,15 11,65g Cr : 0,1<br />

b 0,05<br />

Al Al : 0,05<br />

Ph n 2:

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