Multiple Choice
Give the systematic name for the following polyatomic ion.
AsO43–
3. Chemical Reactions
Polyatomic Ions
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The silicate ion is the silicon version of the carbonate ion. Based on this description, provide the structure of the silicate ion.
A
SiO34-
B
SiO33-
C
SiO32-
D
SiO22-
E
SiO23-
Verified step by step guidance1
Understand the basic structure of the silicate ion. The silicate ion is analogous to the carbonate ion, which has the formula \( \text{CO}_3^{2-} \). This suggests that the silicate ion will have a similar structure but with silicon replacing carbon.
Identify the oxidation state of silicon in the silicate ion. Silicon typically forms bonds with oxygen in a tetrahedral arrangement, similar to carbon in the carbonate ion.
Consider the charge of the silicate ion. The carbonate ion \( \text{CO}_3^{2-} \) has a charge of \(-2\), which is a common charge for silicate ions as well.
Determine the number of oxygen atoms bonded to silicon. In the silicate ion, silicon is bonded to three oxygen atoms, forming \( \text{SiO}_3 \).
Combine the information to write the formula for the silicate ion. With silicon bonded to three oxygen atoms and a charge of \(-2\), the formula for the silicate ion is \( \text{SiO}_3^{2-} \).
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