What happens to table salt when it is mixed with water?a.It stays at the bottom of the water.b.Its sodium and chloride ions disintegrate in the water.c.It produces OH- ions in the solution.d.It stays at the surface of the water.
Question
What happens to table salt when it is mixed with water?a.It stays at the bottom of the water.b.Its sodium and chloride ions disintegrate in the water.c.It produces OH- ions in the solution.d.It stays at the surface of the water.
Solution
When table salt (sodium chloride, NaCl) is mixed with water, it dissolves. This happens because water molecules are polar and interact with the positive and negative ions of the salt. The process can be described as follows:
- The salt is added to the water.
- The water molecules start to interact with the salt ions. The slightly negative oxygen atoms in the water are attracted to the positive sodium ions, and the slightly positive hydrogen atoms in the water are attracted to the negative chloride ions.
- These attractions cause the ions to separate from each other and become surrounded by water molecules. This is called hydration.
- The salt dissolves as the ions are dispersed evenly throughout the water.
So, the correct answer is b. Its sodium and chloride ions disintegrate in the water. The salt does not stay at the bottom (a), it does not produce OH- ions (c), and it does not stay at the surface (d).
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