Give reasons for the following: a) Sodium chloride does not conduct electricity but in molten state or in the aqueous state it is a good conductor of electricity. b) Sodium is kept in kerosene oil. c) Ionic compounds have high melting points.
Answers
Explanation:
a) Sodium chloride does not have any free mobile ions in its solid state which are responsible for the conduction of electricity but in fused or aqueous state it conducts electricity as it has free mobile ions in that state.
b)Sodium and Potassium are highly reactive metals and react vigorously with the oxygen, carbon dioxide and moisture present in the air such that it may even cause a fire. To prevent this explosive reaction, Sodium is kept immersed in kerosene because Sodium doesn't react with kerosene.
c) The strong force of attraction between oppositely charged ions means that ionic compounds have high melting and boiling points. When dissolved in water ionic compounds form a solution in which ions can move. This means that these solutions can conduct electricity.
Answer:
Give reasons for the following: a) Sodium chloride does not conduct electricity but in molten state or in the aqueous state it is a good conductor of electricity. b) Sodium is kept in kerosene oil. c) Ionic compounds have high melting points.