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Ionic compound and properties of ionic compund | ch#4 | 9th class chemistry
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Ionic compound and properties of ionic compund | ch#4 | 9th class chemistry
The ionic compounds have following properties: i. Ionic compounds are mostly crystalline solids. ii. Ionic compounds in solid state have negligible electrical conductance but they are good conductors in solution and in the molten form. It is due to presence of free ions in them. iii. Ionic compounds have high melting and boiling points. For example, sodium chloride has melting point 800 °C and a boiling point 1413 °C. As ionic compounds are made up of positive and negative ions, there exist strong electrostatic forces of attraction between oppositely charged ions. So, a great amount of energy is required to break these forces. iv. They dissolve easily in polar solvents like water. Water has high dielectric constant that weakens the attraction between ions.
The ionic compounds have following properties: i. Ionic compounds are mostly crystalline solids. ii. Ionic compounds in solid state have negligible electrical conductance but they are good conductors in solution and in the molten form. It is due to presence of free ions in them. iii. Ionic compounds have high melting and boiling points. For example, sodium chloride has melting point 800 °C and a boiling point 1413 °C. As ionic compounds are made up of positive and negative ions, there exist strong electrostatic forces of attraction between oppositely charged ions. So, a great amount of energy is required to break these forces. iv. They dissolve easily in polar solvents like water. Water has high dielectric constant that weakens the attraction between ions.
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