황화비소(III)의 분자식. arsenic(III) sulfide 320℃ Ar 0.28 times

황화비소(III)의 분자식. arsenic(III) sulfide 320℃ Ar 0.28 times

 

 

Arsenic(III) sulfide sublimes readily, even below its melting point of 320℃. The molecules of the vapor phase are found to effuse through a tiny hole at 0.28 times the rate of effusion of Ar atoms under the same conditions of temperature and pressure. What is the molecular formula of arsenic(Ill) sulfide in the gas phase?

 

 

황화비소(III)의 증기상 분자는 Ar 원자의 분출 속도에 비해 0.28배.

기체상에서 황화비소(III)의 분자식은 무엇인가?

 

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그레이엄의 확산 법칙

v_X / v_Ar = sqrt(M_Ar / M_X)

( 참고 https://ywpop.tistory.com/3478 )

 

 

 

0.28 = [39.95 / M_X]^(1/2)

M_X = 39.95 / (0.28)^2 = 509.57 g/mol

 

 

 

> Arsenic(III) sulfide의 실험식 = As2S3

 

> As2S3의 실험식량 = 2(As) + 3(S)

= 2(74.92) + 3(32.07) = 246.05

 

 

 

분자량 / 실험식량 = 509.57 / 246.05

= 2.07 ≒ 2 = n

 

 

 

분자식 = n(실험식) = 2(As2S3) = As4S6

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

 

 

 

답: As4S6