Vitamin B12 and the Elderly. Vitamin B12 and the elderly is especially important because as we age, our ability to absorb nutrients from food declines. This condition is called atrophic gastritis and is one of the most common causes for vitamin B12 deficiency among the elderly.
Best Answer: A nonelectrolyte is a substance that doesn't split up into ions when dissolved into solution. LiF is an ionic compound that is soluble in water, completely splitting up into ions. HCl is a strong acid, completely splitting up into ions when dissolved in water. Acetic acid is a weak acid. When dissolved in water, a small percentage of it splits into ions, so it still is an electrolyte. Sucrose does NOT split up into ions when dissolved in water so it is a nonelectrolyte.
When ionic substances are dissolved in water they do not exist as the pure substance (i.e. NaCl) but as dissociated ions (i.e. Na+ and Cl-). These ions respectively carry a positive and negative charge. Water (H2O) is a polar molecule meaning that it has a positive (on the hydrogen atoms) and negative (on the oxygen atom) dipole moment. When NaCl is dissolved in water, the Na+ ions attract the negative dipole moment of H2O and the Cl- ions attract the positive dipole moment of H2O.