1.Arrange the following oxides in the order of increasing basicity.
-Al2O3
-B2O3
-CaO
-Ga2O3
-In2O3
-RaO
2.Arrange the following oxides in the order of most basic to most acidic.
-Al2O3
-Cl2O7
-Cs2O
-N2O5
-Na2O
-P2O5
-SO3
To arrange the oxides in order of increasing basicity, we need to consider their ability to accept protons (H+) and form hydroxide ions (OH-).
1. Al2O3: Aluminum oxide is amphoteric, meaning it can act as both an acid and a base. It can react with both acids and bases and has moderate basicity.
2. B2O3: Boron oxide is acidic and has low basicity.
3. CaO: Calcium oxide is a strong base and has high basicity.
4. Ga2O3: Gallium oxide is amphoteric, similar to Al2O3, and has moderate basicity.
5. In2O3: Indium oxide is amphoteric and has moderate basicity.
6. RaO: Radium oxide is a strong base and has high basicity.
Therefore, the order of increasing basicity is:
B2O3 < Al2O3 < Ga2O3 < In2O3 < RaO < CaO
To arrange the oxides in order of most basic to most acidic, we need to consider their ability to donate protons (H+) and form hydronium ions (H3O+).
1. Cs2O: Cesium oxide is a strong base and has high basicity.
2. Na2O: Sodium oxide is also a strong base and has high basicity.
3. Cs2O < Na2O
Now, let's compare the acids:
1. SO3: Sulfur trioxide is an acidic oxide and forms sulfuric acid when dissolved in water. It has high acidity.
2. Cl2O7: Dichlorine heptoxide is a powerful acid and forms perchloric acid when dissolved in water. It has very high acidity.
3. SO3 < Cl2O7
Now, let's compare the remaining oxides:
1. P2O5: Phosphorus pentoxide is also an acidic oxide and forms phosphoric acid when dissolved in water. It has high acidity.
2. N2O5: Dinitrogen pentoxide is another acidic oxide and forms nitric acid when dissolved in water. It also has high acidity.
3. P2O5 < N2O5
Finally, comparing the remaining two oxides:
1. Al2O3: Aluminum oxide shows amphoteric behavior and can act as both an acid and a base. However, acidic properties are more pronounced.
2. Al2O3 < Na2O < N2O5 < P2O5 < Cl2O7 < SO3
Therefore, the order from most basic to most acidic is:
Cs2O > Na2O > Al2O3 > N2O5 > P2O5 > Cl2O7 > SO3
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