phosgene 1.05 atm 25℃ density 4.24 g/L 12.1% C 16.2% O 71.7% Cl

phosgene 1.05 atm 25℃ density 4.24 g/L 12.1% C 16.2% O 71.7% Cl

 

 

Phosgene is a highly toxic gas made up of carbon, oxygen, and chlorine atoms.

Its density at 1.05 atm and 25℃ is 4.24 g/L.

a) What is the molar mass of phosgene?

b) Phosgene is made up of 12.1% C, 16.2% O, and 71.7% Cl.

What is the molecular formula of phosgene?

 

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a)

M = dRT / P

( 참고 https://ywpop.tistory.com/2933 )

 

= (4.24) (0.08206) (273.15+25) / (1.05)

= 98.8 g/mol

 

 

 

 

b)

C의 몰수 = 12.1 g / (12 g/mol) = 1.008 mol

O의 몰수 = 16.2 / 16 = 1.013 mol

Cl의 몰수 = 71.7 / 35.45 = 2.023 mol

( 참고: 원소분석 https://ywpop.tistory.com/64 )

 

 

C : O : Cl = 1 : 1 : 2

---> 실험식 = COCl2

---> 실험식량 = (12) + (16) + 2(35.45) = 98.9

 

 

실험식량 ≒ 분자량 이므로,

실험식 = 분자식 = COCl2

 

 

 

 

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