Question

Salt water is a good conductor. When salt is dissolved in water, which of following explains why it becomes a good conductor?

a
The salt dissolving generates a large amount of heat which is used to carry current
b
The salt dissolving frees the electrons in the solution, allowing them to move freely
c
The salt dissolving require physical mixing to move the charges
d
The salt dissolving breaks down the insulating molecules of the water

Answer 1

b. The salt dissolving frees the electrons in the solution, allowing them to move freely.