Calcium carbonate has the formula CaCO₃. What is the charge on the polyatomic carbonate ion? A) +2 B) +1 C) 0 D) (-1) E) (-2)

Question

Quizplus · Accepted Answer

The charge on the calcium ion (Ca2+) is +2. Therefore, in order for the compound to have a net charge of 0, the carbonate ion (CO32-) must have a charge of -2. The formula for the carbonate ion is CO32-, not CaCO₃. The correct formula for calcium carbonate is CaCO3, which indicates that the carbonate ion has a charge of -2. Therefore, the answer is (F1F1F1S1F1F1F102).

Calcium Carbonate Has the Formula CaCO3

Calcium Carbonate Has the Formula CaCO₃