liquid water
Liquid water is formed when water vapor condenses i. e. , H 2 O g H 2 O l or when ice melts i. e. , H 2 O s H 2 O l . Because water is a molecular substance, it is a poor conductor of electricity in its pure form. However, as we will see later, its conductivity can be improved by the addition of certain substances. Water molecules are polar, and this overall polarity gives rise to many of the properties of water. For example, an interesting effect is seen when water is placed in a static electric field, as shown in the Figure below and the video below. This phenomenon can be explained in terms of the polarity of water molecules.