Which of the following stetement explains solubility of ionic substance in water?
Correct answer: C. Water molecule is polar
- A. Water molar mass is 18.02
- B. Water forms dative bonding
- C. Water molecule is polar
- D. Water has high density
Explanation
To dissolve an ionic compound, the water molecules must be able to stabilise the ions that result from breaking the ionic bond. They do this by hydrating the ions. Water is a polar molecule. It has a permanent dipole. The O atom has a partial negative charge, and the H atoms have a partial positive charge.
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Liquid behavior depends on intermolecular forces, which produce surface tension, viscosity, capillary action and a definite volume without a fixed shape. The topic also covers vapor pressure, evaporation, boiling point and the effect of temperature and external pressure, while distinguishing evaporation at the surface from boiling throughout the liquid.
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