Question

When $NaCl$ is dissolved in water, the sodium ion is:

• A. oxidised
• B. reduced
• C. hydrolysed
• D. hydrated

Answer 1

The correct option is D hydrated

When NaCl is dissolved in water, then due to the high dielectric constant of water, water dissosciates the NaCl molecule into ${Na}^{+}$ ions and ${Cl}^{-}$ions. Each ${Na}^{+}$ion and ${Cl}^{-}$ ion is surrounded by multiple water molecules. This process is called as hydration of NaCl. Thus, ${Na}^{+}$ion is said to be hydrated.