H-Cl 결합의 이온결합성 백분율. 1.03 D 127 pm

H-Cl 결합의 이온결합성 백분율. 1.03 D 127 pm

 

 

The dipole moment of HCl is 1.03 D, if H-Cl bond distance is 1.27 Å, what is the percentage of ionic character in the H-Cl bond?

 

The dipole moment of HCl is 1.03 D, and the bond length is 127 pm. What is the percent ionic character of the HCl bond?

 

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μ = Q × r (단위: D)

( 참고 https://ywpop.tistory.com/2581 )

 

1 D = 3.336×10^(-30) C•m

 

 

 

1 Å = 10^(-10) m 이므로,

1.27 Å × (10^(-10) m / 1 Å) = 1.27×10^(-10) m

 

1 pm = 10^(-12) m 이므로,

127 pm × (10^(-12) m / 1 pm) = 127×10^(-12) m

 

 

 

μ(theoretical) = Q × r

= (1.60×10^(-19) C) (1.27×10^(-10) m) (1 D / 3.336×10^(-30) C•m)

= (1.60×10^(-19) C) (126×10^(-12) m) (1 D / 3.336×10^(-30) C•m)

= 6.09 D

 

 

 

percentage of ionic character = μ(experimental) / μ(theoretical) × 100

= (1.03 D / 6.09 D) × 100 = 16.9%

 

 

답: 16.9%

 

 

 

[참고] 전자(e^-) 1개의 전하량 = 1.60×10^(-19) C