Is H2O a weak, strong, or nonelectrolyte?

Answer

H2O (pure water) is considered a nonelectrolyte. An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water. This happens because the substance dissociates into ions. Specifically, a strong electrolyte dissociates completely, while a weak electrolyte dissociates only partially. Although pure water undergoes very slight autoionization to produce hydronium (H3O+) and hydroxide (OH-) ions, the concentration of these ions is extremely low (1.0 x 10^-7 M at 25°C). Because this degree of ionization is so negligible, pure water does not conduct electricity effectively and is classified as a nonelectrolyte in most general chemistry contexts.