If in Al + MnO2 is more reactive or Al +Mn3O4 is more reactive?
To determine which combination, Al + MnO2 or Al + Mn3O4, is more reactive, we need to compare the reactivity of the respective elements.
1. Reactivity of Aluminum (Al): Aluminum is a highly reactive metal and readily reacts with oxygen in the air. When exposed to air, it quickly forms a layer of oxide on its surface, called aluminum oxide (Al2O3). This oxide layer acts as a protective barrier and prevents further reaction with the environment.
2. Reactivity of Manganese Dioxide (MnO2): Manganese dioxide is a compound that contains manganese and oxygen. It is commonly used as a catalyst and has various applications. However, in terms of reactivity, it is not as reactive as aluminum.
3. Reactivity of Manganese(II,III) Oxide (Mn3O4): Manganese(II,III) oxide, also known as trimanganese tetraoxide, contains both manganese(II) and manganese(III) ions. It is a mixed-valence compound and can exhibit both oxidizing and reducing properties. Compared to manganese dioxide, manganese(II,III) oxide is relatively more reactive.
Considering the reactivity of aluminum and the manganese compounds, we can conclude that the combination Al + MnO2 is less reactive compared to Al + Mn3O4. This is because manganese(II,III) oxide (Mn3O4) is more reactive than manganese dioxide (MnO2).