Gold, silver, aluminum and copper are common metallic conductors, with copper being the most commonly used for wiring. Liquids may also be capable of conducting an electrical current. Liquids which carry an electric current are routinely referred to as electrolytic conductors. The conductance of a liquid can be defined by its electrical properties - the ratio of current to voltage between any two points within the liquid. As the two points move closer together or further apart, this value will change.
Distance does increase resistance, thereby reducing conductance.
The standard measurement of conductance is defined as the reciprocal of the resistance in ohms, measured between the opposing faces of 1 cm cube of liquid at a specific temperature. Absolutely pure water is actually a poor electrical conductor, having a resistivity of 18.2 million ohms-cm. This is relatively easy to compensate for, but it is suggested that you perform all measurements as the same room temperature so that no compensation is required. This means that to measure one also measures the other. This greatly simplifies the task as sensitive ohmmeters are readily available.