How do water molecules dissolve a salt?A.The salt crystals squeeze in between water molecules.B.The water molecules move around the salt crystals.C.The water molecules move around the salt ions.D.The water molecules separate the crystals into molecules.
Question
How do water molecules dissolve a salt?A.The salt crystals squeeze in between water molecules.B.The water molecules move around the salt crystals.C.The water molecules move around the salt ions.D.The water molecules separate the crystals into molecules.
Solution
The process of dissolving salt in water involves the following steps:
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When salt (sodium chloride) is placed in water, the polar water molecules are attracted to the ions that make up the salt.
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The positive part of the water molecule (hydrogen) is attracted to the negative part of the salt (chloride ion), and the negative part of the water molecule (oxygen) is attracted to the positive part of the salt (sodium ion).
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As the water molecules move, they collide with the salt crystals and pull away the individual ions due to these attractions.
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The water molecules then surround and separate the ions, effectively dissolving the salt in the water.
So, the correct answer to your question is C. The water molecules move around the salt ions.
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