what happens when NaCl(s) is dissolved in water?
(1)Cl-ions are attracted to the oxygen atoms of the water
(2)Cl-ions are attracted to the hydrogen atoms of the water.
(3)Na+ions are attracted to the hydrogen atoms of the water.
(4)no attractions are involved; the crystal just falls apart.
please help & explain the answer !
go wittle rockstar
When NaCl(s) is dissolved in water, it dissociates into Na+ and Cl- ions. Ionic compounds, like NaCl, have a crystal lattice structure in the solid state, where the positive ions (Na+) are surrounded by negative ions (Cl-) in a repeating pattern.
In water, the water molecules are polar, meaning they have a slightly positive end (hydrogen atoms) and a slightly negative end (oxygen atom). When NaCl is added to water, the polar water molecules interact with the ions, resulting in the dissociation of NaCl into its constituent ions.
Now, let's go through each option and see which one accurately describes what happens when NaCl(s) is dissolved in water:
(1) Cl- ions are attracted to the oxygen atoms of the water: This is not correct. The water molecules are polar, so the slightly positive hydrogen atoms of water are attracted to the negative Cl- ions, not the oxygen atoms.
(2) Cl- ions are attracted to the hydrogen atoms of the water: This is the correct answer. The positive end of water molecules (hydrogen atoms) are attracted to the negative Cl- ions. This attraction allows the Cl- ions to become surrounded by water molecules in a process called solvation, or hydration in the case of water.
(3) Na+ ions are attracted to the hydrogen atoms of the water: This is not correct. The positive Na+ ions are attracted to the negative oxygen atoms of the water molecules, not the hydrogen atoms.
(4) No attractions are involved; the crystal just falls apart: This is not correct. When NaCl is dissolved in water, it undergoes dissociation, and the crystal lattice structure breaks down as the Na+ and Cl- ions disperse throughout the water.
Therefore, the correct answer is: (2) Cl- ions are attracted to the hydrogen atoms of the water.