BIO NMDCAT Biological Importance of Water
nmdcat.online June 27, 2026

A major reason that water is an excellent solvent for ionic compounds, such as NaCl, is its

A. Ability to form strong covalent bonds with sodium and chloride ions
B. High dielectric constant, which reduces the electrostatic attraction between ions
C. Non-polar nature that surrounds and isolates the crystal lattice
D. Low viscosity that mechanically separates the crystal lattice

📝 Explanation

Water has a high dielectric constant (~80 at 20°C). This means it significantly weakens the electrostatic force of attraction between the oppositely charged Na⁺ and Cl⁻ ions in the crystal lattice, allowing them to dissociate and become surrounded by hydration shells.

📖 Additional Information

  • Ability to form strong covalent bonds with sodium and chloride ions
  • High dielectric constant, which reduces the electrostatic attraction between ions
  • Non-polar nature that surrounds and isolates the crystal lattice
  • Low viscosity that mechanically separates the crystal lattice

Water has a high dielectric constant (~80 at 20°C). This means it significantly weakens the electrostatic force of attraction between the oppositely charged Na⁺ and Cl⁻ ions in the crystal lattice, allowing them to dissociate and become surrounded by hydration shells.

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