A woman's doctor tells her to gargle with salt water. She stirs a tablespoon of salt into a cup of warm water, and watches it dissolve. Why does the salt dissolve in water?
a. The positive hydrogen atoms in water molecules are attracted to chlorine ions, and the negative oxygen atoms in water molecules are attracted to sodium ions.
b. The negative oxygen atoms in water molecules are attracted to sodium ions.
c. The positive hydrogen atoms in water molecules are attracted to chlorine ions.
d. The positive hydrogen atoms in water molecules are attracted to sodium ions.
e. The negative oxygen atoms in water molecules are attracted to chlorine ions.
Ans: a. The positive hydrogen atoms in water molecules are attracted to chlorine ions, and the negative oxygen atoms in water molecules are attracted to sodium ions.
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