Polar Covalent Bonds Lecture Demonstrations

From ChemPRIME

Sublimation of Non-Polar Iodine

Add iodine crystals to a pre-heated 2 L Erlenmeyer flask on a hotplate and observe the sublimation and subsequent formation of beautiful crystals.

Easy sublimation is due to lack of permanent charge.

Solubility of Polar vs. NonPolar Gases in Water

An HCl fountain can be used^[1][2][3][4] to demonstrate the high solubility of HCl in polar water. Compare to oxygen, nitrogen.

References

1. ↑ Alyea, H.N.; Duton, F.B. "Tested Demonstrations in Chemistry", J. Chem. Educ., Easton, PA 1965, p. 13-14
2. ↑ Ned Steadman. J. Chem. Educ., 1992, 69 (9), p 764
3. ↑ Nicholas C. Thomas and Stephen Faulk , Randy Sullivan J. Chem. Educ., 2008, 85 (8), p 1063
4. ↑ J. Chem. Educ., 1995, 72 (9), p 828