Chemistry - Salt Analysis Question with Solution | TestHub

The reaction of manganese(II) hydroxide, Mn(OH)₂, with hydrogen peroxide, H₂O₂, in an alkaline medium leads to the oxidation of Mn(II) to Mn(IV). The product formed is manganese(IV) oxide hydroxide, MnO(OH)₂, which is often represented as hydrated manganese dioxide.

The balanced chemical equation for this reaction is:

$$\mathrm{Mn}(\mathrm{OH}{)}_2(\mathrm{s})+{\mathrm{H}}_2{\mathrm{O}}_2(\mathrm{aq})\to \mathrm{MnO}(\mathrm{OH}{)}_2(\mathrm{s})+{\mathrm{H}}_2\mathrm{O}(\mathrm{l})$$

In this reaction, hydrogen peroxide acts as an oxidizing agent, while manganese(II) hydroxide is oxidized. The oxidation state of manganese changes from +2 in Mn(OH)₂ to +4 in MnO(OH)₂.

Therefore, the suitable compound to fill in the blank is MnO(OH)₂.

The final answer is $\boxed{MnO(OH{)}_2}$.