Which argument supports the claim that dissolving solid calcium chloride (CaCl2) in water is a chemical change?

A. The ionic bond between the calcium ions and chloride ions is broken.
B. The solid calcium chloride can be recovered by evaporating the water.
C. The ions present in the solid are still present in the solution and have not changed.
D. The polar water molecules exert attractions on the ions.

Is the answer a?

The answer is a

It's A I promise you I took the quiz

Yes, the correct answer is A. The argument that supports the claim that dissolving solid calcium chloride (CaCl2) in water is a chemical change is that the ionic bond between the calcium ions (Ca2+) and chloride ions (Cl-) is broken.

To arrive at this answer, let's analyze each option:

A. The ionic bond between the calcium ions and chloride ions is broken:
When solid calcium chloride is dissolved in water, the polar water molecules surround and interact with the ions, causing the ionic bond between the calcium and chloride ions to be broken. This indicates a chemical change.

B. The solid calcium chloride can be recovered by evaporating the water:
This option refers to the recovery of calcium chloride by evaporating the water. The ability to recover the original substance suggests a physical change, rather than a chemical change.

C. The ions present in the solid are still present in the solution and have not changed:
This option states that the ions from the solid calcium chloride are still present in the solution and have not changed. This indicates that the dissolution process is a physical change, rather than a chemical change.

D. The polar water molecules exert attractions on the ions:
This option explains the nature of how water molecules interact with ions in the solution. While it is true that polar water molecules exert attractions on the ions, it does not directly support the claim that dissolving calcium chloride in water is a chemical change.

Therefore, option A is the best argument supporting the claim that dissolving solid calcium chloride in water is a chemical change.

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