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일반화학/[03장] 화학량론

25.2 g Al metal HBr AlBr3 gram

by 영원파란 2021. 5. 29.

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25.2 g Al metal HBr AlBr3 gram

 

 

Certain metals can displace hydrogen from acids

to produce hydrogen gas and a salt.

When 25.2 g of aluminum metal are placed into hydrobromic acid,

how many grams of aluminum bromide will be produced?

(Write the balanced equation first.)

 

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Al의 몰질량 = 26.98 g/mol

25.2 g / (26.98 g/mol) = 0.934 mol Al

( 참고 https://ywpop.tistory.com/7738 )

 

 

 

균형 맞춘 화학 반응식

2Al + 6HBr → 2AlBr3 + 3H2

 

Al : AlBr3 = 1 : 1 계수비(= 몰수비) 이므로,

생성되는 AlBr3의 몰수 = 0.934 mol

 

 

 

AlBr3의 몰질량 = 266.69 g/mol

0.934 mol × (266.69 g/mol) = 249 g AlBr3

 

 

 

답: 249 g

 

 

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