Which one is a soluble salt in H2O? A. CuS B. Zn(OH)2 C. CaCl2 D. PbCl2

The correct answer is C. CaCl2.

A soluble salt is a salt that dissolves in water. The solubility of a salt depends on the type of ions that it is made up of. Some ions, such as sodium and chloride, are very soluble in water. Other ions, such as calcium and sulfate, are less soluble.

CuS is a copper sulfide salt. Copper sulfide is a black

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