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Why is HCl predominantly covalent in the...

Why is HCl predominantly covalent in the gaseous state but is ionic in squeous solution ?

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In HCl, the electronegativity difference in Cl and H atoms (3.0-2.1) is 0.9. Therefore, it is predominantly covalent in the gaseous state. When dissoved in water which is of polar nature, there an attraction between the atoms of the acid and polar `H_(2)O` molecules. Energy is released dureing attraction. This helps in the ionisation of the acid. Therefore, `C Cl_(4)` molecule, C-Cl bonds are polar but molecule is non ploar in aqueous solution.
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DINESH PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE -BORD EXAMINATIONS
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  2. A molecule of H(2) exist while that of the He(2) does not. Explain.

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  3. NaCl and AgNO(3) are ionic solids and they readily dissodciate to from...

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  4. BeF(2) and H(2)O are both tri-atomic molecules but have different shap...

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  5. Bond angle in NH(3) is molre than in PH(3). Explain.

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  6. Why is HCl predominantly covalent in the gaseous state but is ionic in...

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  7. Can a non-polar molecule have polar covalent bonds?

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  8. (a) Explain sigma and pi bonds with suitable examples, (b) A pi bond...

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  9. PCl(5) exists but NCl(5) does not because

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  10. o- nitrophenol is steam volatile while p-nitrophenol is not. Discuss.

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  11. KHF(2) exists while KHCl(2) does not. Explain.

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  12. Yor are given the electronic configuration of five neural atoms -A,B,C...

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  13. Boiling point of ethane is more than that of methane. Assign reason.

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  14. Which comopound from each of the following pairs ismore covalent and w...

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  15. The bond angles in NH(4)^(+) and CH(4) are same but NH(3) has differen...

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  16. Predict which out of the following species are planar. (i) NH(4)^(+)...

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  17. Why is MgCl(2) molecule linear whereas the molecules of SnCl(2) chlori...

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  18. The hybridisatio of oxygen in both water and diethyl ether molecules i...

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  19. Both Na and H occur in group 1 of the periodic table ,yet melting poin...

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  20. With the help of molecular orbital theory, draw the molecular orbital ...

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