Metallic conductivity refers to the ability of metals to conduct electricity due to the presence of free electrons in their structure, while electrolytic conductivity refers to the ability of solutions to conduct electricity due to the movement of ions within the solution.
Conductance is the measure of a material's ability to conduct an electric current, and it is defined as the reciprocal of resistance. The SI unit of conductance is the siemens (S).
The concentration of ions in a solution can affect its conductivity. Generally, the higher the concentration of ions in a solution, the higher its conductivity. This is because a higher concentration of ions provides more particles that can move and conduct an electric current. However, this relationship is not always linear and can depend on the specific properties of the ions and the solution.