Question

The following pictures represent various silicate anions. Give the formula and charge of each anions.

• A. (a)$Si{O}_4^{4-}$; (b)$S{i}_3{O}_{10}^{8-}$; (c)$S{i}_4{O}_{12}^{8-}$
• B. (a)$Si{O}_4^4$; (b)$S{i}_4{O}_{12}^8$; (c)$S{i}_3{O}_{10}^8$
• C. (a)$Si{O}_4^{4-}$; (b)$S{i}_3{O}_{10}^{6-}$; (c)$S{i}_4{O}_{12}^{7-}$
• D. (a)$Si{O}_4^{4-}$; (b)$S{i}_4{O}_{10}^{7-}$; (c)$S{i}_3{O}_{12}^{6-}$

Answer 1

The correct option is A (a)$Si{O}_4^{4-}$; (b)$S{i}_3{O}_{10}^{8-}$; (c)$S{i}_4{O}_{12}^{8-}$

One silicon is bonded to four oxygen ions. No. of edges represents no. of oxygen ions.

1st image has one silicon atom so the formula is $Si{O}_4^{4-}$

2nd image has three silicon atom so the formula is $S{i}_3{O}_{10}^{8-}$

3rd image has four silicon atom so the formula is $S{i}_4{O}_{12}^{8-}$

Hence, option A is correct.