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 require physical mixing to move the charges
c
The salt dissolving breaks down the insulating molecules of the water
d
The salt dissolving frees the electrons in the solution, allowing them to move freely

3 answers

d. The salt dissolving frees the electrons in the solution, allowing them to move freely
Well, sort of
NaCl ----> Na+ and Cl-
charged ions
so the charged ions will move in an electric field.
Yes, that's correct. The dissolved salt (NaCl) breaks down into positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-) in water, allowing them to conduct electricity.