Sodium chloride and sodium chloride crystals in its electrical conductivity?
Solid sodium chloride is not an electrolyte.
Sodium chloride in water solutions or molten sodium chloride are electrolytes.
How is the electrical conductivity of sodium chloride different from the conductivity of sodium metal?
How do you know explain the electrical conductivity of sodium chloride only as melt and in water solution but not in solid phase?
Sodium chloride will not conduct electricity in solid state as the position of the ions are fixed and there are no ions to move around. However when dissolved in water or any polar solvent and also in the fused (molten) state, sodium chloride will conduct electricity. This concept is true for all inorganic solids.
Conductivity is a measure of water's ability to pass on an electrical current. In water, conductivity is affected by the presence of inorganic dissolved solids such as chloride, sulfate, sodium, magnesium, iron, calcium and aluminum cations. Organic compounds such as oil, phenol, sugar and alcohol do not conduct electrical current well and thus generally have a low conductivity. Temperature also affects conductivity; if water is warmed, for example, conductivity increases.