The infinitely extended silicate ion shown in the picture below combines with calcium and magnesium to form the mineral diopside.What is the formula and charge of the repeating unit of the silicate ion? A)SiO₃^2- B)Si₂O₆^4- C)Si₃O₁₀^8- D)Si₆O₂₄^24-

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Quizplus · Accepted Answer

The repeating unit of the silicate ion can be determined by counting the number of oxygen atoms shared between each tetrahedron and taking the ratio of silicon to oxygen. In this case, there are 4 oxygen atoms shared between each tetrahedron and there are 4 tetrahedra. Therefore, the ratio of Si to O in the repeating unit is 1:4. The silicate ion has a charge of 4-. The formula and charge of the repeating unit of the silicate ion is Si₂O₆^4-.

The Infinitely Extended Silicate Ion Shown in the Picture Below