___ is another name for Copper Sulfate.

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Multiple Choice

___ is another name for Copper Sulfate.

Explanation:
Copper sulfate is known for its vivid blue color when hydrated, which is captured by the name blue stone. The hydrated form, CuSO4·5H2O, forms blue crystals, so historically this compound has been called blue stone (also known as blue vitriol). The other color terms don’t match its appearance—green stone would suggest a green copper compound like malachite, white stone isn’t representative of the hydrated copper sulfate, and red stone doesn’t apply. So the blue stone designation directly reflects the compound’s characteristic color.

Copper sulfate is known for its vivid blue color when hydrated, which is captured by the name blue stone. The hydrated form, CuSO4·5H2O, forms blue crystals, so historically this compound has been called blue stone (also known as blue vitriol). The other color terms don’t match its appearance—green stone would suggest a green copper compound like malachite, white stone isn’t representative of the hydrated copper sulfate, and red stone doesn’t apply. So the blue stone designation directly reflects the compound’s characteristic color.

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