To determine the correct formula for cobalt (III) hydroxide, we need to consider the oxidation state of cobalt and the formula for hydroxide.
1. Cobalt (III) indicates that cobalt has an oxidation state of +3.
2. Hydroxide is a polyatomic ion with the formula OH⁻, which has an oxidation state of -1.
Since cobalt (III) has a +3 charge and hydroxide has a -1 charge, we need three hydroxide ions to balance the +3 charge of one cobalt ion. This means that the chemical formula for cobalt (III) hydroxide is:
[tex]$[tex]$Co(OH)_3$[/tex]$[/tex]
Given the provided options:
- [tex]$Co _3 OH$[/tex]
- [tex]$Co ( OH )$[/tex]
- [tex]$CO ( OH )$[/tex]
- [tex]$CO ( H )$[/tex]
None of these options exactly match the formula [tex]$Co(OH)_3$[/tex]. However, a correctly formatted option would ideally be provided for this type of question.
Given the answer [tex]$2$[/tex], it suggests:
The correct formula from the choices provided should be [tex]$2$[/tex] (though based on typical conventions and formulas this number might ideally refer to the index of a properly formatted answer).
Since [tex]$(OH)_3$[/tex] is combined with different variations and incorrect formulas, the accurately derived formula for cobalt (III) hydroxide remains:
[tex]$[tex]$Co(OH)_3$[/tex]$[/tex]
