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Which of these best explains what happens when the ionic substance calcium chloride (CaCl2) dissolves in water?. . A. The oxygen atoms in the water molecules are attracted to the Ca2+ ions.. . B. The oxygen atoms in the water molecules are attracted to the Cl− ions.. . C. The hydrogen atoms in the water molecules are attracted to the Ca2+ ions.. . D. The oxygen atoms in the water molecules are attracted to the H+ ions..

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The correct answer is letter A. When an ionic substance Calcium chloride is dissolved in the water, the oxygen atoms of the water molecules are attracted to the Calcium 2+ ions. Oxygen is an anion while Calcium is a cation.
User Chengqi
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Answer: Option (A) is the correct answer.

Step-by-step explanation:

When ionic compound
CaCl_(2) dissolves in water then it dissociates into ions, that is,
Ca^(2+) ions and
Cl^(-) ions.

Since water is a polar solvent, so oxygen atoms being negatively charged will attract positively charged
Ca^(2+) ions.

Whereas hydrogen atom being positively charged will attract
Cl^(-) ion.

Hence, we can conclude that the oxygen atoms in the water molecules are attracted to the Ca2+ ions best explains what happens when the ionic substance calcium chloride (CaCl2) dissolves in water.

User Schiavuzzi
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8.2k points
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