2.56 g Al Br2 Al2Br6

2.56 g Al Br2 Al2Br6

 

 

2.56 g Al과 완전 반응에 필요한 Br2의 질량은?

Al2Br6의 질량은?

 

 

Like many metals, aluminum reacts with a halogen

to give a metal halide, aluminum bromide.

2Al(s) + 3Br2(l) → Al2Br6(s)

What mass of Br2, in grams,

is required for complete reaction with 2.56 g of Al?

What mass of white, solid AI2Br6 is expected?

 

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Al의 몰질량 = 26.98 g/mol

2.56 g / (26.98 g/mol) = 0.094885 mol Al

( 참고 https://ywpop.tistory.com/7738 )

 

 

 

Al : Br2 = 2 : 3 계수비(= 몰수비) 이므로,

Al : Br2 = 2 : 3 = 0.094885 mol : ? mol

? = 3 × 0.094885 / 2 = 0.1423275 mol Br2 반응.

 

 

 

Br2의 몰질량 = 159.81 g/mol

0.1423275 mol × (159.81 g/mol) = 22.7 g Br2

 

 

 

Al : Al2Br6 = 2 : 1 계수비(= 몰수비) 이므로,

Al : Al2Br6 = 2 : 1 = 0.094885 mol : ? mol

? = 0.094885 / 2 = 0.0474425 mol Al2Br6 생성.

 

 

 

Al2Br6의 몰질량 = 533.39 g/mol

0.0474425 mol × (533.39 g/mol) = 25.3 g Al2Br6